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    Sb3+dopant and halogen substitution triggered highly efficient and tunable emission in lead-free metal halide single crystals / Y. Jing, Y. Liu, X. Jiang [et al.] // Chem. Mater. - 2020. - Vol. 32, Is. 12. - P. 5327-5334, DOI 10.1021/acs.chemmater.0c01708. - Cited References: 46. - This work is supported by the National Natural Science Foundation of China (51961145101, 51972118, and 51722202), Fundamental Research Funds for the Central Universities (FRFTP-18-002C1), Guangzhou Science & Technology Project (202007020005), Guangdong Provincial Science &Technology Project (2018A050506004), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). This work is also funded by RFBR according to the research project no. 19-52-80003 . - ISSN 0897-4756
   Перевод заглавия: Высокоэффективное и перестраиваемое излучение в монокристаллах бессвинцовых металлогалогенидов допированных Sb3+
Кл.слова (ненормированные):
Crystal structure -- Excitons -- Lead compounds -- Luminescence -- Metals
Аннотация: Rational doping and compositional control remain significant challenges in designing luminescent metal halides to achieve highly efficient and tunable emission. Here, the air-stable lead-free Cs2InCl5·H2O crystal with a zero-dimensional structure was investigated as a pristine compound to design new luminescence materials. Sb3+-doping in Cs2InCl5·H2O:Sb3+ enabled broadband yellow emission with a photoluminescence quantum yield up to 95.5%. The emission colors can be expanded into the orange-red region by halogen compositional substitution for Cs2InX5·H2O:Sb3+ (X = Cl/Br/I). The optical characterizations along with the theoretical calculations demonstrate that the characteristic singlet and triplet self-trapped exciton emissions of ns2-metal-halide centers account for the tunable luminescence. Moreover, the admirable stability against air and heat pave way for its further applications in white light-emitting diodes and high-resolution fluorescent signs in anticounterfeiting technology. Our achievement in the case of Sb3+-doped Cs2InCl5·H2O represents a successful strategy for developing stable lead-free metal halides with highly efficient emission for versatile optical applications.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
University of Chinese Academy of Sciences, Beijing, 100049, China
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Technology, South China University of Technology, Guangzhou, 510640, China

Доп.точки доступа:
Jing, Y.; Liu, Y.; Jiang, X.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lin, Z.; Xia, Z.
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Plotnikova, A. A.
Structural Characteristics and Processability of Sphalerite in Lead-Zinc Ore of the Gorevka Deposit / A. A. Plotnikova, V. I. Bragin, Y. V. Knyazev // J. Min. Sci. - 2019. - Vol. 55, Is. 6. - P. 995-1006, DOI 10.1134/S1062739119066381. - Cited References: 33 . - ISSN 1062-7391. - ISSN 1573-8736

РУБ Mining & Mineral Processing

Кл.слова (ненормированные):
Lead-zinc ore -- iron-bearing sphalerite -- pyrrhotine -- X-ray phase analysis -- micro-X-ray spectrum analysis -- high-gradient separation -- Mossbauer spectroscopy
Аннотация: The theoretical and experimental substantiation of the behavior of ferrous sphalerite in magnetic separation is given in terms of the Gorevka deposit ore. In sphalerite of this deposit, the content of isomorphous iron ranges as 4-9%. The Mossbauer spectroscopy showed the singlet and two doublet lines of iron, demonstrating separate arrays of iron atoms in sphalerite lattice, with formation of Fe-Fe pairs and clusters of three or more iron atoms. It is found that distribution of iron in sphalerite into three forms coincides for magnetic and nonmagnetic products of zinc concentrate separation. It is determined that magnetic separation undivides sphalerite grains by the isomorphous iron content but is governed by the genetic features of the deposit formation-association of sphalerite with magnetic minerals (pyrrhotine and siderite) and the absence of such associations in galena.

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Публикация на русском языке Плотникова А. А. Структурно-технологические характеристики сфалерита в свинцово-цинковых рудах Горевского месторождения [Текст] / А. А. Плотникова, В. И. Брагин, Ю. В. Князев // Физ.-техн. проблемы разраб. полез. ископаемых. - 2019. - № 6. - С. 152-164

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kiriensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Bragin, V. I.; Knyazev, Yu. V.; Князев, Юрий Владимирович
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Incorporating rare-earth terbium(III) ions into Cs2AgInCl6:Bi nanocrystals toward tunable photoluminescence / Y. Liu, X. M. Rong, M. Z. Li [et al.] // Angew. Chem. - 2020. - Vol. 132, Is. 28. - P. 11731-11737, DOI 10.1002/ange.202004562. - Cited References: 43 . - ISSN 1521-3757

РУБ Chemistry, Multidisciplinary
Рубрики:
HALIDE DOUBLE PEROVSKITE
   LEAD-FREE
   LANTHANIDE
   STABILITY
   EMISSION
Кл.слова (ненормированные):
doping -- energy transfer -- perovskite nanocrystals -- photoluminescence -- terbium
Аннотация: The incorporation of impurity ions or doping is a promising method for controlling the electronic and optical properties and the structural stability of halide perovskite nanocrystals (NCs). Herein, we establish relationships between rare‐earth ions doping and intrinsic emission of lead‐free double perovskite Cs2AgInCl6 NCs to impart and tune the optical performances in the visible light region. Tb3+ ions were incorporated into Cs2AgInCl6 NCs and occupied In3+ sites as verified by both crystallographic analyses and first‐principles calculations. Trace amounts of Bi doping endowed the characteristic emission (5D4→7F6‐3) of Tb3+ ions with a new excitation peak at 368 nm rather than the single characteristic excitation at 290 nm of Tb3+. By controlling Tb3+ ions concentration, the emission colors of Bi‐doped Cs2Ag(In1−xTbx)Cl6 NCs could be continuously tuned from green to orange, through the efficient energy‐transfer channel from self‐trapped excitons to Tb3+ ions. Our study provides the salient features of the material design of lead‐free perovskite NCs and to expand their luminescence applications.

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Держатели документа:
Univ Sci, Sch Materials Sciences, Beijing Municipal Key Lab New Energy Materials, Technology Beijing,Technologies,Engn, Beijing, P. R. China.
Shenzhen Univ, Coll Materials Sci, Guangdong Res Ctr Interfacial Engn Functional Mat, Shenzhen Key Lab Special Functional Materials, Shenzhen, P. R. China.
Kirensky Inst Phys, Fed Res Ctr KSC SB RASs, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys, Radioelectronics, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
S China Univ Technology, Sch Materials Sci, State Key Lab Luminescent Materials, Guangdong Prov Key Lab Fiber Laser Materials, Guangzhou, P. R. China.

Доп.точки доступа:
Liu, Ying; Rong, Ximing; Li, Mingze; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhao, Jing; Xia, Zhiguo
}
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Temperature-dependent Raman spectroscopy, domain morphology and photoluminescence studies in lead-free BCZT ceramic / I. Coondoo, N. Panwar, S. Krylova [et al.] // Ceram. Int. - 2021. - Vol. 47, Is. 2. - P. 2828-2838, DOI 10.1016/j.ceramint.2020.09.137. - Cited References: 65. - I.C. would like to thank financial assistance by national funds (OE), through FCT – Fundação para a Ciência e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology / MCTES . The authors would also like to acknowledge the Ural Center for Shared Use “Modern nanotechnology”, Ural Federal University, Russia and the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”. The authors would like to thank Dr. E. Venkata Ramana, Department of Physics, University of Aveiro for the dielectric measurements. The work was supported by Government of the Russian Federation (Act 211, 440 Agreement 02.A03.21.0006) . - ISSN 0272-8842
Кл.слова (ненормированные):
Lead-free ceramics -- Raman spectroscopy -- Domain morphology -- Photoluminescence
Аннотация: Present work focuses on detailed temperature-dependent X-ray diffraction, Raman scattering, domain configuration, and photoluminescence (PL) studies in the (Ba0·85Ca0.15) (Zr0·10Ti0.90)O3 (BCZT) ceramics. The comprehensive Raman spectroscopy analysis in the present work not only validates the presence of the intermediate orthorhombic phase in BCZT, but also provides evidence of another transition: rhombohedral R3c phase to R3m at low temperature. Temperature behaviour of the lowest frequency transverse optical mode (soft E (TO) phonon) and hard modes was studied. Temperature dependence of peak positions, intensities, and linewidths of Raman phonon modes signalled the presence of phase transitions near −50 ± 5 °C, 0±5 °C, 35±5 °C and 110 ± 10 °C. Evolution of domain morphology occurring at phase transitions above room temperature was studied by piezoresponse force microscopy technique. Analysis of PL spectra revealed disorder/heterogeneity in the sample and indicated the existence of self-trapped excitons. PL spectra are composed of four distinct colour components (~2.55eV:blue, ~2.32eV:green, ~2.08eV:orange and ~1.78eV:red).

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Держатели документа:
Department of Physics & CICECO – Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal
Department of Physics, Central University of Rajasthan, BandarsindriRajasthan 305817, India
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk660036, Russian Federation
School of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg620026, Russian Federation
I3N-Aveiro, Department of Physics, University of Aveiro, Aveiro, 3810-193, Portugal

Доп.точки доступа:
Coondoo, I.; Panwar, N.; Krylova, S. N.; Крылова, Светлана Николаевна; Krylov, A. S.; Крылов, Александр Сергеевич; Alikin, D.; Jakka, S. K.; Turygin, A.; Shur, V. Y.; Kholkin, A. L.
}
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Synthesis, Structure, and Thermophysical Properties of Pb10 – xBix(GeO4)2 + xVO4)4 – x (x = 0–3) in the Temperature Range of 350–950 K / L. T. Denisova, M. S. Molokeev, V. M. Denisov [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 11. - P. 2045-2051, DOI 10.1134/S1063783420110116. - Cited References: 26. - The study was carried out under the state assignment for science for the Siberian Federal University, project no. FSRZ-2020-0013 . - ISSN 1063-7834
Кл.слова (ненормированные):
bismuth-doped lead vanadate germanates -- apatites -- structure -- high-temperature specific heat -- thermodynamic properties
Аннотация: The Pb10 – xBix(GeO4)2 + x(VO4)4 – x (x = 0–3) compounds with an apatite structure have been obtained for the first time from the initial PbO, Bi2O3, GeO2, and V2O5 oxides by the solid-state synthesis in the temperature range of 773–1073 K. The structure of the compounds has been determined by X-ray diffraction analysis. The effect of temperature on specific heat of the synthesized compounds has been investigated by differential scanning calorimetry. The thermodynamic properties of the compounds have been calculated from the experimental Cp = f(T) data.

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Публикация на русском языке Синтез, структура и теплофизические свойства апатитов Pb10-xBix(GeO4)2+xVO4)4-x (x=0-3) в области 350-950 K [Текст] / Л. Т. Денисова, М. С. Молокеев, В. М. Денисов [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 11. - С. 1828-1833

Держатели документа:
Siberian Federal University, Institute of Metallurgy and Materials Science, Krasnoyarsk, 660041, Russian Federation
Siberian Federal University, Institute of Engineering Physics and Radio Electronics, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Denisov, V. M.; Golubeva, E. O.; Galiakhmetova, N. A.
}
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    Incorporating rare-earth terbium(III) Ions into Cs2AgInCl6:Bi nanocrystals toward tunable photoluminescence / Y. Liu, X. M. Rong, M. Z. Li [et al.] // Angew. Chem. - Int. Edit. - 2020. - Vol. 59, Is. 28. - P. 11634-11640, DOI 10.1002/anie.202004562. - Cited References: 43. - This work is supported by the National Natural Science Foundation of China (51961145101, 51972118 and 51722202), Fundamental Research Funds for the Central Universities (FRFTP-18-002C1), Guangdong Provincial Science & Technology Project (2018A050506004) and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). This work is also funded by RFBR according to the research project No. 19-52-80003. . - ISSN 1433-7851. - ISSN 1521-3773
   Перевод заглавия: Включение редкоземельного тербия (III) в нанокристаллы Cs2AgInCl6: Bi для перестраиваемой фотолюминесценции

РУБ Chemistry, Multidisciplinary
Рубрики:
HALIDE DOUBLE PEROVSKITE
   LEAD-FREE
   LANTHANIDE
   STABILITY
   EMISSION
Кл.слова (ненормированные):
doping -- energy transfer -- perovskite nanocrystals -- photoluminescence -- terbium
Аннотация: The incorporation of impurity ions or doping is a promising method for controlling the electronic and optical properties and the structural stability of halide perovskite nanocrystals (NCs). Herein, we establish relationships between rare‐earth ions doping and intrinsic emission of lead‐free double perovskite Cs2AgInCl6 NCs to impart and tune the optical performances in the visible light region. Tb3+ ions were incorporated into Cs2AgInCl6 NCs and occupied In3+ sites as verified by both crystallographic analyses and first‐principles calculations. Trace amounts of Bi doping endowed the characteristic emission (5D4→7F6‐3) of Tb3+ ions with a new excitation peak at 368 nm rather than the single characteristic excitation at 290 nm of Tb3+. By controlling Tb3+ ions concentration, the emission colors of Bi‐doped Cs2Ag(In1−x Tbx )Cl6 NCs could be continuously tuned from green to orange, through the efficient energy‐transfer channel from self‐trapped excitons to Tb3+ ions. Our study provides the salient features of the material design of lead‐free perovskite NCs and to expand their luminescence applications.

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Держатели документа:
Univ Sci & Technol Beijing, Beijing Municipal Key Lab New Energy Mat & Techno, Sch Mat Sci & Engn, Beijing 100083, Peoples R China.
Shenzhen Univ, Shenzhen Key Lab Special Funct Mat, Shenzhen Engn Lab Adv Technol Ceram, Guangdong Res Ctr Interfacial Engn Funct Mat,Coll, Shenzhen 518060, Peoples R China.
Fed Res Ctr KSC SB RASs, Lab Crystal Phys, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Sch Mat Sci & Technol, Guangzhou 510641, Peoples R China.

Доп.точки доступа:
Liu, Ying; Rong, Ximing; Li, Mingze; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhao, Jing; Xia, Zhiguo
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    Colloidal and immobilized nanoparticles of lead xanthates / S. A. Vorobyev [et al.] // ACS Omega. - 2019. - Vol. 4, Is. 7. - P. 11472-11480, DOI 10.1021/acsomega.9b00841. - Cited References: 56. - This research was supported by Russian Science Foundation, project 18-17-00135. . - ISSN 2470-1343
   Перевод заглавия: Коллоидные и иммобилизированные наночастицы ксантогенатов свинца
Аннотация: Although nanoparticles of heavy metal xanthates and their hydrosols can play important roles in froth flotation, environmental issues, analytics, and manufacturing of metal sulfide nanocomposites, they have received little attention. We studied colloidal solutions and immobilized particles prepared via interaction of aqueous lead nitrate with alkyl xanthates applying UV−vis absorption spectroscopy, dynamic light scattering, zeta potential measurement, thermogravimetry analysis, Fourier transform infrared spectroscopy, Raman scattering, X-ray photoelectron spectroscopy, atomic force microscopy, and transmission electron microscopy. The hydrodynamic diameter of colloidal particles of Pb(SSCOR)2 decreased from 500 to 50 nm with an increase in the alkyl radical length and the initial xanthate to lead ratio (X/Pb); the zeta potential magnitude varied similarly, although it remained negative. The effect of pH in the range of 4.5−11 was minor, but the colloids produced using excess of Pb2+ in alkaline media were close to PbX and decomposed much easier than PbX2. The uptake of lead xanthates on supports was generally low because of negative charges of the colloids; however, 50−100 nm thick PbX2 films were deposited on PbS and SiO2 from the media of X/Pb 2 and pH 9 because of preadsorption of Pb2+, while nanorods formed on highly oriented pyrolytic graphite.

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Держатели документа:
Institute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Scientific Center”, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 50/24, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny pr. 79, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center” of, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Vorobyev, S. A.; Saikova, S. V.; Novikova, S. A.; Fetisova, O. Y.; Zharkov, S. M.; Жарков, Сергей Михайлович; Krylov, A. S.; Крылов, Александр Сергеевич; Likhatski, M. N.; Mikhlin, Y. L.
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    Lead-Free Perovskite Derivative Cs2SnCl6−xBrx Single Crystals for Narrowband Photodetectors / J. Zhou [et al.] // Adv. Opt. Mater. - 2019. - Vol. 7, Is. 10. - Ст. 1900139, DOI 10.1002/adom.201900139. - Cited References: 26. - J.Z., J.J.L., X.M.R. contributed equally to this work. The present work was supported by the National Natural Science Foundation of China (Grants 51722202, 91622125, 51572023, and 11774239), Natural Science Foundations of Beijing (2172036), and National Key R&D Program of China (grant no. 2016YFB0700700). . - ISSN 2195-1071
   Перевод заглавия: Бессвинцовые монокристаллы производного перовскита Cs2SnCl6-xBrx для узкополосных фотоприемников
Кл.слова (ненормированные):
band structure -- Cs2SnBr6 -- Cs2SnCl6 -- lead-free perovskite derivatives -- narrowband photodetection
Аннотация: Lead-free and stable Sn halide perovskites demonstrate tremendous potential in the field of optoelectronic devices. Here, the structure and optical properties of the “defect” perovskites Cs2SnCl6−xBrx are reported, as well as their use as photodetector materials. Millimeter‐sized Cs2SnCl6−xBrx single crystals are grown by the hydrothermal method, with the body color continuously changing from transparent to yellow and finally to dark red. Narrowband single‐crystal photodetectors using Cs2SnCl6−xBrx crystals are presented, which show a high detectivity of ≈2.71 × 1010 Jones, with narrowband photodetection (full‐width at half‐maximum ≈45 nm) and high ion diffusion barriers. Moreover, the response spectra are continuously tuned from near violet to orange depending on the variation of the bandgap of the single crystals by changing the halide compositions. The strong surface charge recombination of the excess carriers near the crystal surfaces produced by short wavelength light elucidates the narrowband photodetection behavior. This work provides a new paradigm in the design of lead‐free, stable, and high‐performance perovskite derivatives for optoelectronics applications.

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Держатели документа:
The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
Sargent Joint Research Center, Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China
Shenzhen Key Laboratory of Flexible Memory Materials and Devices, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China

Доп.точки доступа:
Zhou, J.; Luo, J.; Rong, X.; Wei, P.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Huang, Y.; Zhao, J.; Liu, Q.; Zhang, X.; Tang, J.; Xia, Z.
}
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    Role of Halogen Atoms on High-Efficiency Mn2+ Emission in Two-Dimensional Hybrid Perovskites / G. J. Zhou [et al.] // J. Phys. Chem. Lett. - 2019. - Vol. 10, Is. 16. - P. 4706-4712, DOI 10.1021/acs.jpclett.9b01996. - Cited References: 37. - This work is supported by the National Natural Science Foundation of China (No. 51722202 and 51572023), the Natural Science Foundations of Beijing (2172036), the Fundamental Research Funds for the Central Universities (FRF-TP-18-002C1), and the Guangdong Provincial Science & Technology Project (No. 2018A050506004). . - ISSN 1948-7185
   Перевод заглавия: Роль атомов галогенов в высокоэффективном излучении Mn2 + в двумерном гибридном перовските

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Atomic, Molecular & Chemical
Рубрики:
ENERGY-TRANSFER
   LIGHT-EMISSION
   DOPING MN2+
   LEAD-FREE
   NANOCRYSTALS
Аннотация: Doped halide pervoskites as highly efficient light emitters have recently fascinated the research community, while the influence of halogen atoms X (X = Cl, Br, I) on the hybrid energy levels and photoluminescence properties remains a challenge. Here, the role of X compositions in the two-dimensional hybrid perovskite BA2PbX4 (BA = C4H9NH3) on the doped Mn2+ emission is identified, wherein Mn2+ reveals a strong luminescence dependence on the nature of the halogen, and optimum Mn2+ emission with a record quantum yield of 60.1% has been achieved in BA2PbBr4. Density functional theory calculations show that BA2PbBr4 holds low Br vacancy concentration and unique coupled states of the Mn-3d level and Pb-6p level at the conduction band minimum, leading to efficient energy transfer from the host to Mn2+. Our work sheds new light on the methods to realize strong exciton–dopant exchange coupling for achieving high-efficiency dopant luminescence.

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Держатели документа:
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China.
Beihang Univ, Sch Phys, Minist Educ, Key Lab Micronano Measurement Manipulat & Phys, Beijing 100191, Peoples R China.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Guangdong, Peoples R China.
South China Univ Technol, Inst Opt Commun Mat, Guangzhou 510641, Guangdong, Peoples R China.

Доп.точки доступа:
Zhou, Guojun; Jia, Xiaofang; Guo, Shaoqiang; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhang, Junying; Xia, Zhiguo
}
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10.

    Su, Binbin.
    Unveiling Mn2+ dopant states in two-dimensional halide perovskite toward highly efficient photoluminescence / B. B. Su, M. S. Molokeev, Z. G. Xia // J. Phys. Chem. Lett. - 2020. - Vol. 11, Is. 7. - P. 2510-2517, DOI 10.1021/acs.jpclett.0c00593. - Cited References: 49. - This work is supported by the National Natural Science Foundation of China (51961145101, 51972118, and 51722202), Fundamental Research Funds for the Central Universities (D2190980), the Guangdong Provincial Science & Technology Project (2018A050506004), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). This work is also funded by RFBR according to the research project no. 19-52-80003. . - ISSN 1948-7185
   Перевод заглавия: Открытие легирующих состояний Mn2 + в двумерном галоидном перовските для высокоэффективной фотолюминесценции

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Atomic, Molecular & Chemical
Рубрики:
LEAD BROMIDE PEROVSKITES
   ENERGY-TRANSFER
   EXCITON DYNAMICS
   DOPING MN2+
Аннотация: Doping is able to create novel optoelectronic properties of halide perovskites, and the involved mechanism of efficient emission is still a challenge. Herein Mn2+ substitution into 2D layered perovskites (C8H20N2)PbBr4 was investigated, demonstrating broad-band orange-red emission originating from the 4T1 → 6A1 transition of Mn2+ dopant. The photoluminescence quantum yield (PLQY) of Mn2+ emission is up to 60.8% related to the energy transfer in coupled states. We verify that an actual Mn2+ dopant as low as 0.476% reaches a high PLQY, whereas the nominal adding amount is 0.8 as the Mn2+/Pb2+ ratio. The small activation energy (∼6.72 meV) between the Mn2+ d state and the trap state accounts for this highly efficient energy transfer and photoluminescence. The proposed luminescence mechanism in Mn2+-doped 2D halide perovskites would provide unique insights into the doping design toward high-performance luminescence materials.

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Держатели документа:
South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Sch Mat Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Zhiguo
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11.

    Lead-Free Hybrid Metal Halides with a Green-Emissive [MnBr4] Unit as a Selective Turn-On Fluorescent Sensor for Acetone / M. Li [et al.] // Inorg. Chem. - 2019. - Vol. 58, Is. 19. - P. 13464-13470, DOI 10.1021/acs.inorgchem.9b02374. - Cited References: 38. - This work is supported by the National Natural Science Foundation of China (Nos. 51722202 and 51972118), Natural Science Foundations of Beijing (2172036), the Fundamental Research Funds for the Central Universities (FRF-TP-18-002C1), and the Guangdong Provincial Science & Technology Project (No. 2018A050506004). . - ISSN 0020-1669
   Перевод заглавия: Бессвинцовые гибридные металлогалогениды, с излучающим зеленый свет [MnBr4], в качестве селективного флуоресцентного датчика ацетона
Аннотация: Organic-inorganic hybrid metal halides with zero-dimensional (0D) structure has emerged as a new class of light-emitting materials. Herein, a new lead-free compound (C9NH20)2MnBr4 has been discovered and a temperature-dependent phase transition has been identified for two phases (space group P21/c and C2/c) in which individual [MnBr4]2- anions connect with organic cations, (C9NH20 +) (1-buty-1-methylpyrrolidinium+), forming periodic structure with 0D blocks. A green emission band, peaking at 528 nm with a high photoluminescence quantum efficiency (PLQE) of 81.08%, has been observed at room temperature, which is originated from the 4T1(G) to 6A1 transition of tetrahedrally coordinated Mn2+ ions, as also elaborated by density functional theory calculation. Accordingly, a fast, switchable, and highly selective fluorescent sensor platform for different organic solvents based on the luminescence of (C9NH20)2MnBr4 has been developed. We believe that the hybrid metal halides with high PLQE and the exploration of these as a fluorescence sensor will expand the applications scope of bulk 0D materials for future development.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
State Key Lab. of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China

Доп.точки доступа:
Li, M.; Zhou, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Jiang, X.; Lin, Z.; Zhao, J.; Xia, Z.
}
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12.

    Solvatochromic photoluminescent effects in all-inorganic manganese(II)-based perovskites by highly selective solvent-induced crystal-to-crystal phase transformations / H. Xiao, P. Dang, X. Yun [et al.] // Angew. Chem. - 2021. - Vol. 133, Is. 7. - P. 3743-3751, DOI 10.1002/ange.202012383. - Cited References: 73. - This work was supported by National Natural Science Foundation of China (NSFC 51932009, 51772288, 52072349, 51672259) and the Joint Fund Project to Promote Science and Technology Cooperation Across the Taiwan Straits (U2005212), the Science and Technology Cooperation Fund between Chinese and Australian Governments (2017YFE0132300), CAS-Croucher Funding Scheme for Joint Laboratories (CAS18204), Chinese Academy of Sciences (YZDY-SSWJSC018) . - ISSN 1521-3757
   Перевод заглавия: Сольватохромные фотолюминесцентные эффекты в полностью неорганическом перовските на основе марганца (II), вызванные высокоселективными фазовыми превращениями кристалла-кристалл, индуцированными растворителем
Кл.слова (ненормированные):
lead-free materials -- low-dimensional perovskites -- luminescence -- manganese -- phase transitions
Аннотация: The development of lead‐free perovskite photoelectric materials has been an extensive focus in the recent years. Herein, a novel one‐dimensional (1D) lead‐free CsMnCl3(H2O)2 single crystal is reported with solvatochromic photoluminescence properties. Interestingly, after contact with N,N‐dimethylacetamide (DMAC) or N,N‐dimethylformamide (DMF), the crystal structure can transform from 1D CsMnCl3(H2O)2 to 0D Cs3MnCl5 and finally transform into 0D Cs2MnCl4(H2O)2. The solvent‐induced crystal‐to‐crystal phase transformations are accompanied by loss and regaining of water of crystallization, leading to the change of the coordination number of Mn2+. Correspondingly, the luminescence changes from red to bright green and finally back to red emission. By fabricating a test‐paper containing CsMnCl3(H2O)2, DMAC and DMF can be detected quickly with a response time of less than one minute. These results can expand potential applications for low‐dimensional lead‐free perovskites.

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Держатели документа:
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022 China
University of Science and Technology of China, Hefei, 230026 China
Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074 China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Siberian Federal University, 660041 Krasnoyarsk, Russia
Department of Physics, Far Eastern State Transport University, 680021 Khabarovsk, Russia

Доп.точки доступа:
Xiao, Hui; Dang, Peipei; Yun, Xiaohan; Li, Guogang; Wei, Yi; Xiao, Xiao; Zhao, Yajie; Molokeev, M. S.; Молокеев, Максим Сергеевич; Cheng, Ziyong; Lin, Jun
}
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13.

Low-temperature resistivity of polycrystalline (La0.5Eu 0.5)0.7Pb0.3MnO3 in a magnetic fields / K. A. Shaykhutdinov [et al.] // J. Phys. Conf. Ser. - 2010. - Vol. 200, Is. SECTION 5, DOI 10.1088/1742-6596/200/5/052025 . - ISSN 1742-6588
Кл.слова (ненормированные):
Antiferromagnetic grains -- Comparative analysis -- Ferromagnetic grain -- Low temperatures -- Polycrystalline -- Specific heat measurement -- Spin dependent tunneling -- Transport and magnetic properties -- Antiferromagnetism -- Electric resistance -- Europium -- Grain boundaries -- Grain size and shape -- Lanthanum compounds -- Lead -- Magnetic field effects -- Magnetic properties -- Magnetoresistance -- Manganese oxide -- Single crystals -- Thermal variables measurement -- Lanthanum
Аннотация: The effect of grain boundaries on magnetoresistance (MR) of manganites have been investigated by the comparative analysis of the properties of single-crystal and polycrystalline (La0.5Eu0.5) 0.7Pb0.3MnO3. While MR of the single crystal is maximum near the Curie temperature and vanishes in the low-temperature region, the polycrystalline (La0.5Eu0.5)0.7Pb 0.3MnO3 sample exhibits high MR in the low-temperature region. In order to clarify the origin of the low-temperature MR, the transport and magnetic properties of the polycrystalline (La0.5Eu 0.5)0.7Pb0.3MnO3 in magnetic fields have been supplemented by study of magnetic properties and specific heat measurements. The results obtained could be attributed to spin-dependent tunneling between ferromagnetic grains through insulating antiferromagnetic grain boundaries. © 2010 IOP Publishing Ltd.

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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Semenov, S. V.; Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sablina, K. A.; Саблина, Клара Александровна; Volkov, N. V.; Волков, Никита Валентинович
}
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14.

Heat capacity and magnetocaloric effect in manganites (La1-yEuy)(0.7)Pb0.3MnO3 (y:0.2; 0.6) / A. V. Kartashev [et al.] // J. Magn. Magn. Mater. - 2010. - Vol. 322, Is. 6. - P. 622-627, DOI 10.1016/j.jmmm.2009.10.026. - Cited Reference Count: 17. - Гранты: This work was supported by the Krasnoyarsk's regional sciences foundation and RFBR in the framework of project "Siberia''(Grant no. 09-02-98001), by Integrational project of Siberian and Far Eastern Departments of RAS(no. 101) and by Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools(Projectno. NSh-1011.2008.2). Dr Maxim S. Molokeev is acknowledged for the X-raycharacterization of the samples. - Финансирующая организация: Krasnoyarsk's regional sciences foundation [09-02-98001]; Siberian and Far Eastern Departments [101]; Russian Federation [NSh-1011.2008.2] . - MAR. - ISSN 0304-8853
Рубрики:

Кл.слова (ненормированные):
Manganites -- Magnetic phase transition -- Heat capacity -- Magnetocaloric effect -- Heat capacity -- Magnetic phase transition -- Magnetocaloric effect -- Manganites -- Adiabatic calorimeters -- Heat capacities -- Magnetic phase transitions -- Magneto-caloric effects -- Magnetocaloric effect -- Multi-element -- Nonmagnetics -- Relative cooling power -- Temperature range -- Europium -- Lead -- Manganese compounds -- Oxide minerals -- Specific heat -- Phase transitions
Аннотация: Heat capacity and intensive magnetocaloric effect (MCE) in manganites (La1-yEuy)(0.7)Pb0.3MnO3[y=0.2; 0.6] (LEPM) were investigated by means of adiabatic calorimeter. The heat capacity anomaly as well as the values of both the intensive (Delta T-AD) and the extensive (Delta S-MCE) MCE were found to decrease upon increased replacement of La with nonmagnetic Eu. However, because of widening of the MCE peaks, the LEPM compounds show the relative cooling power, RCP/Delta H, comparable to other solid solutions of manganites. Owing to strong effect of Eu -> La substitution on the Curie temperature, LEPM might have potential as the solid state refrigerants in multi-element cooling apparatus operating in a wide temperature range. (C) 2009 Elsevier B.V. All rights reserved.

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Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660079, Russia

Доп.точки доступа:
Kartashev, A. V.; Карташев, Андрей Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Volkov, N. V.; Волков, Никита Валентинович; Sablina, K. A.; Саблина, Клара Александровна
}
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15.

Efficiency of energy harvesting and storage using a multilayer capacitor based on BaTi0.86Sn0.14O3 ferroelectric lead-free ceramics / V. D. Fokina, V. S. Bondarev, E. I. Pogoreltsev, I. N. Flerov // Ceram. Int. - 2022. - Vol. 48, Is. 22. - P. 32966-32972, DOI 10.1016/j.ceramint.2022.07.227. - Cited References: 45 . - ISSN 0272-8842
Кл.слова (ненормированные):
Ferroelectric properties -- BaTiO3 and titanates -- Capacitors -- Energy harvesting/storage
Аннотация: The study of the parameters of energy harvesting and storage in the lead-free solid solution BaTi0.86Sn0.14O3 (BTSnO) was performed. The permittivity shows the behavior similar to a diffuse phase transition with the critical exponent γ = 1.84, which is close to the value characteristic of relaxors. Large values of the recoverable energy density, Wrec=(5.8–7.0)∙104 J/m3, and the energy storage efficiency coefficient, η=(82–94) %, are implemented in a wide temperature range, 30–87°С, at a low electric field, E = 18.5 kV/cm. For the first time, the analysis of the Olsen cycle was performed using two phase diagrams: polarization – electric field and entropy – temperature. A fairly good agreement was found between the values of the energy conversion density, ND ≈ 0.15 J/cm3, which was determined using two approaches. A universal parameter is proposed for comparing the energy harvesting density for the materials studied in different ranges of temperature and electric fields.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660074, Russian Federation

Доп.точки доступа:
Fokina, V. D.; Фокина, Валентина Дмитриевна; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Pogoreltsev, E. I.; Погорельцев, Евгений Ильич; Flerov, I. N.; Флёров, Игорь Николаевич
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16.

Temperature/component-dependent luminescence in lead-free hybrid metal halides for temperature sensor and anti-counterfeiting / G. Zhou, Y. Wang, Y. Mao [et al.] // Adv. Funct. Mater. - 2024. - Ст. 2401860, DOI 10.1002/adfm.202401860. - Cited References: 89. - G.J.Z. and Y.T.W. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (No.52202177, 22271211), Fundamental Research Program of Shanxi Province (No.20210302124054), Science and Technology Innovation Project of Colleges and Universities in Shanxi Province (No.2021L262), 1331 Project of Shanxi Province, Postgraduate Innovation Project of Shanxi Province (No.2023KY462), and supported by the Ministry of Science and High Education of Russian Federation (No.FSRZ-2023-0006). The authors would like to thank Prof. Haijun Jiao, Leibniz-Institut für Katalyse e.V., Germany, for the theoretical support on the electron-transition mechanism . - Article in press. - ISSN 1616-301X. - ISSN 1616-3028
Кл.слова (ненормированные):
electron-transition -- hybrid metal halides -- optical-functional applications -- self-trapped excitons -- tunable photoluminescence
Аннотация: Hybrid metal halides (HMHs) have emerged as a promising platform for optically functional crystalline materials, but it is extremely challenging to thoroughly elucidate the electron transition coupled to additional ligand emission. Herein, to discover sequences of lead-free HMHs with distinct optically active metal cations are aimed, that is, Sb3+ (5s2) with the lone-pair electron configuration and In3+ (4d10) with the fully-filled electron configuration. (Me2NH2)4MCl6·Cl (Me = −CH3, M = Sb, In) exhibits the superior temperature/component-dependent luminescence behaviors resulting from the competition transition between triplet-states (Tn-S0) self-trapped excitons (STEs) of inorganic units and singlet-state (S1-S0) of organic cations, which is manipulated by the optical activity levels of [SbCl6]3− and [InCl6]3−. The bonding differences between Sb3+/In3+ and Cl− in terms of electronic excitation and hybridization are emphasized, and the different electron-transition mechanisms are established according to the PL spectra at the extreme temperature of 5 to 305 K and theoretical calculations. By fine-tuning the B-site Sb3+/In3+ alloying, the photoluminescence quantum yield (PLQY = 81.5%) and stability are optimized at 20% alloying of Sb3+. This research sheds light on the rules governing PL behaviors of HMHs, as well as exploring the optical-functional application of aviation temperature sensors and access-control systems.

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Держатели документа:
Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
International Research Center of Spectroscopy and Quantum Chemistry-IRC SQC, Siberian Federal University, Krasnoyarsk 660041, Russia
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, Guangdong 510641, P. R. China
College of Chemistry & Chemical Engineering, Key Laboratory of Interface Science and Engineering in Advanced Material, Ministry of Education, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P. R. China

Доп.точки доступа:
Zhou, G.; Wang, Y.; Mao, Y.; Guo, C.; Zhang, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Z.; Zhang, X.-M.
}
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17.

Synthesis, crystal structure and thermodynamic properties of apatite Pb3Bi2(GeO4)3 / L. T. Denisova, M. S. Molokeev, E. O. Golubeva [и др.] // Phys. Solid State. - 2022. - Vol. 64, Is. 7. - P. 889-893, DOI 10.21883/PSS.2022.07.54599.312. - Cited References: 30. - This work was partially supported within the scope of the state assignment for science of FSAEI HE ”Siberian Federal University“, project number FSRZ-2020-0013 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
apatite bismuth-lead germanate -- solid-phase synthesis -- high-temperature heat capacity -- thermodynamic properties
Аннотация: Apatite Pb3Bi2(GeO4)3 was obtained by the solid-phase method from the initial oxides of PbO, Bi2O3 and GeO2 by sequential firing in air at temperatures of 773–1003 K. Its crystal structure has been refined by X-ray diffraction. The high-temperature heat capacity (350–1000 K) of this compound was measured by differential scanning calorimetry. Based on these data, the main thermodynamic functions are calculated.

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Публикация на русском языке Синтез, кристаллическая структура и термодинамические свойства апатита Pb3Bi2(GeO4)3 [Текст] / Л. Т. Денисова, М. С. Молокеев, Е. О. Голубева [и др.] // Физ. тверд. тела. - 2022. - Т. 64 Вып. 7. - С. 886-890

Держатели документа:
Siberian Federal University, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Golubeva, E. O.; Belousova, N. V.; Denisov, V. M.
}
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18.

    Синтез, кристаллическая структура и термодинамические свойства апатитоподобных ванадато-германатов свинца гадолиния / Л. Т. Денисова, М. С. Молокеев, Е. О. Голубева, Н. А. Галиахметова // Журн. СФУ. Химия. - 2022. - Т. 15, № 1. - Ст. 128-136 ; J. Sib. Fed. Univ. Chem. - 2022, DOI 10.17516/1998-2836-0277. - Библиогр.: 25. - Авторы выражают благодарность Красноярскому региональному центру коллективного пользования ФИЦ КНЦ СО РАН. Работа выполнена при частичной финансовой поддержке в рамках государственного задания на науку ФГАОУ ВО «Сибирский федеральный университет», номер проекта FSRZ‑2020–0013 . - ISSN 1998-2836. - ISSN 2313-6049
   Перевод заглавия: Synthesis, crystal structure and thermodynamic properties of apatite-like lead gadolinium vanadato-germanates
Кл.слова (ненормированные):
апатиты -- твердофазный синтез -- кристаллическая структура -- высокотемпературная теплоемкость -- термодинамические свойства -- apatites -- solid-phase synthesis -- crystal structure -- high-temperature heat capacity -- thermodynamic properties
Аннотация: Методом твердофазных реакций обжигом на воздухе стехиометрических смесей PbO, Gd2O3, GeO2 и V2O5 в интервале температур 773–1073 K синтезированы апатиты Pb10-xGdx(GeO4)2+x(VO4)4-x (x = 0.5, 1.0). С использованием рентгеноструктурного анализа определена их кристаллическая структура. Методом дифференциальной сканирующей калориметрии измерена высокотемпературная теплоемкость (350–1000 K). По экспериментальным данным Cp = f(T) рассчитаны термодинамические свойства апатитов.
The Pb10-xGdx(GeO4)2+x(VO4)4-x (x = 0.5, 1.0) apatites were synthesized by the solid-phase synthesis by roasting stoichiometric mixtures of PbO, Gd2O3, GeO2, and V2O5 in air at temperatures of 773–1073 K. Their crystal structure was determined using X‑ray diffraction analysis. The high-temperature heat capacity (350–1000 K) was measured by differential scanning calorimetry. The experimental data Cp = f (T) were used to calculate the thermodynamic properties of apatites.

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Держатели документа:
Сибирский федеральный университет, Российская Федерация, Красноярск
Институт физики им. Л. В. Киренского ФИЦ КНЦ СО РАН, Российская Федерация, Красноярск

Доп.точки доступа:
Денисова, Л. Т.; Молокеев, Максим Сергеевич; Molokeev, M. S.; Голубева, Е. О.; Галиахметова, Н. А.; Siberian Federal University [FSRZ-2020-0013]

}
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19.

    Luminescent zero-dimensional hybrid lead thiohalide nanostructures for high quantum yield and broadband excitation / N. N. Golovnev, A. S. Aleksandrovsky, M. A. Gerasimova [et al.] // ACS Appl. Nano Mat. - 2021. - Vol. 4, Is. 4. - P. 3654-3663, DOI 10.1021/acsanm.1c00162. - Cited References: 55. - This work is supported by the RFBR according to the research project No. 19-52-80003. This work is also supported by the National Natural Science Foundation of China (51961145101). V.M. thanks Russian Foundation for Basic Research (project number 19-03-00043) for funding. The use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged. The authors thank JSCC RAS for providing computational resources . - ISSN 2574-0970
   Перевод заглавия: Наноструктуры люминесцентных нульразмерных гибридных тиогалогенов свинца для высокого квантового выхода и широкополосного спектра возбуждения
Кл.слова (ненормированные):
Zero-dimensional hybrid metal halide -- Luminescence -- Quantum yield -- Mechanochemical synthesis -- X-ray diffraction -- Dimethylthiourea
Аннотация: Luminescent trans-[Pb(DMTU-S)4Cl2] (DMTU: N,N′-dimethylthiourea) was designed and prepared via either mechanochemical or solvothermal methods, and the structures of DMTU and trans-[Pb(DMTU-S)4Cl2] have been resolved using X-ray single-crystal diffraction. Upon excitation over broadband covering the range from 450 to 250 nm, trans-[Pb(DMTU-S)4Cl2] shows yellow-green emission peaking at 549 nm with a spectral width of 110 nm, which is assigned to the triplet–singlet transition of Pb2+ ions within distorted heterogeneous S4Cl2 octahedra. The broadband excitation comprised singlet–singlet transitions of Pb2+ ions and energy transfer from orbitals involving those of organic ligands. Simultaneous analysis of the luminescent bandwidth and Stokes shift gives for Pb2+ ions in S4Cl2 octahedra the value of the Huang–Rhys parameter S = 4.25 and the energy of phonon involved in the formation of the luminescence spectrum of the order of 90 meV. Quantum yield as high as 91% is detected for excitation at 365 nm. This high quantum yield indicates the absence of noticeable concentration quenching at an average distance of 9.4 Å between the Pb2+ ions within the structure of trans-[Pb(DMTU)4Cl2]. The weak spin–orbit intersystem crossing is deduced from a high photoluminescence quantum yield (PLQY) value. Time dependent-density functional theory (TD-DFT) calculations of the nanocluster indicate the red shift of absorption bands in Pb(DMTU)4Cl2 with respect to parent DMTU. The high-performance photoluminescence and stability demonstrated promising applications in photonics.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Technology, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center, KSC, SB, RAS, Krasnoyarsk, 660036, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo 650000, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Gerasimova, M. A.; Tomilin, F. N.; Томилин, Феликс Николаевич; Mironov, V. A.; Demina, A. V.; Xia, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
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20.

Solvatochromic Photoluminescent Effects in All-Inorganic Manganese(II)-Based Perovskites by Highly Selective Solvent-Induced Crystal-to-Crystal Phase Transformations / H. Xiao, P. P. Dang, X. H. Yun [et al.] // Angew. Chem. Int. Edit. - 2021. - Vol. 60, Is. 7. - P. 3699-3707, DOI 10.1002/anie.202012383. - Cited References: 85. - This work was supported by National Natural Science Foundation of China (NSFC 51932009, 51772288, 52072349, 51672259) and the Joint Fund Project to Promote Science and Technology Cooperation Across the Taiwan Straits (U2005212), the Science and Technology Cooperation Fund between Chinese and Australian Governments (2017YFE0132300), CAS-Croucher Funding Scheme for Joint Laboratories (CAS18204), Chinese Academy of Sciences (YZDY-SSWJSC018) . - ISSN 1433-7851. - ISSN 1521-3773

РУБ Chemistry, Multidisciplinary
Рубрики:
LEAD-FREE
   HALIDE PEROVSKITE
   NANOCRYSTALS
   MN2+
   LUMINESCENCE
Кл.слова (ненормированные):
lead-free materials -- low-dimensional perovskites -- luminescence -- manganese -- phase transitions
Аннотация: The development of lead‐free perovskite photoelectric materials has been an extensive focus in the recent years. Herein, a novel one‐dimensional (1D) lead‐free CsMnCl3(H2O)2 single crystal is reported with solvatochromic photoluminescence properties. Interestingly, after contact with N,N‐dimethylacetamide (DMAC) or N,N‐dimethylformamide (DMF), the crystal structure can transform from 1D CsMnCl3(H2O)2 to 0D Cs3MnCl5 and finally transform into 0D Cs2MnCl4(H2O)2. The solvent‐induced crystal‐to‐crystal phase transformations are accompanied by loss and regaining of water of crystallization, leading to the change of the coordination number of Mn2+. Correspondingly, the luminescence changes from red to bright green and finally back to red emission. By fabricating a test‐paper containing CsMnCl3(H2O)2, DMAC and DMF can be detected quickly with a response time of less than one minute. These results can expand potential applications for low‐dimensional lead‐free perovskites.

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Держатели документа:
Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, 5625 Renmin St, Changchun 130022, Peoples R China.
Univ Sci & Technol China, Hefei 230026, Peoples R China.
China Univ Geosci, Fac Mat Sci & Chem, Minist Educ, Engn Res Ctr Nanogeomat, Wuhan 430074, Peoples R China.
RAS, SB, Lab Crystal Phys, Kirensky Inst Phys,Fed Res Ctr,KSC, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.

Доп.точки доступа:
Xiao, Hui; Dang, Peipei; Yun, Xiaohan; Li, Guogang; Wei, Y.i.; Xiao, Xiao; Zhao, Yajie; Molokeev, M. S.; Молокеев, Максим Сергеевич; Cheng, Ziyong; Lin, Jun
}
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