Библиотека института физики им. Л.В. Киренского СО РАН

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Jing Y., Liu Y., Jiang X., Molokeev M. S., Lin Z., Xia Z.
Заглавие : Sb3+dopant and halogen substitution triggered highly efficient and tunable emission in lead-free metal halide single crystals
Место публикации : Chem. Mater. - 2020. - Vol. 32, Is. 12. - P.5327-5334. - ISSN 08974756 (ISSN), DOI 10.1021/acs.chemmater.0c01708
Примечания : 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
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Plotnikova A. A., Bragin V. I., Knyazev Yu. V.
Заглавие : Structural Characteristics and Processability of Sphalerite in Lead-Zinc Ore of the Gorevka Deposit
Место публикации : J. Min. Sci. - 2019. - Vol. 55, Is. 6. - P.995-1006. - ISSN 1062-7391, DOI 10.1134/S1062739119066381. - ISSN 1573-8736(eISSN)
Примечания : Cited References: 33
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Liu, Ying, Rong, Ximing, Li, Mingze, Molokeev M. S., Zhao, Jing, Xia, Zhiguo
Заглавие : Incorporating rare-earth terbium(III) ions into Cs2AgInCl6:Bi nanocrystals toward tunable photoluminescence
Место публикации : Angew. Chem. - 2020. - Vol. 132, Is. 28. - P.11731-11737. - ISSN 1521-3757(eISSN), DOI 10.1002/ange.202004562
Примечания : Cited References: 43
Предметные рубрики: HALIDE DOUBLE PEROVSKITE
LEAD-FREE
LANTHANIDE
STABILITY
EMISSION
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Coondoo I., Panwar N., Krylova S. N., Krylov A. S., Alikin D., Jakka S. K., Turygin A., Shur V. Y., Kholkin A. L.
Заглавие : Temperature-dependent Raman spectroscopy, domain morphology and photoluminescence studies in lead-free BCZT ceramic
Место публикации : Ceram. Int. - 2021. - Vol. 47, Is. 2. - P.2828-2838. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2020.09.137
Примечания : 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)
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Denisova L. T., Molokeev M. S., Denisov V. M., Golubeva E. O., Galiakhmetova N. A.
Заглавие : Synthesis, Structure, and Thermophysical Properties of Pb10 – xBix(GeO4)2 + xVO4)4 – x (x = 0–3) in the Temperature Range of 350–950 K
Место публикации : Phys. Solid State. - 2020. - Vol. 62, Is. 11. - P.2045-2051. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783420110116
Примечания : Cited References: 26. - The study was carried out under the state assignment for science for the Siberian Federal University, project no. FSRZ-2020-0013
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Liu, Ying, Rong, Ximing, Li, Mingze, Molokeev M. S., Zhao, Jing, Xia, Zhiguo
Заглавие : Incorporating rare-earth terbium(III) Ions into Cs2AgInCl6:Bi nanocrystals toward tunable photoluminescence
Место публикации : Angew. Chem. - Int. Edit. - 2020. - Vol. 59, Is. 28. - P.11634-11640. - ISSN 1433-7851, DOI 10.1002/anie.202004562. - ISSN 1521-3773(eISSN)
Примечания : 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.
Предметные рубрики: HALIDE DOUBLE PEROVSKITE
LEAD-FREE
LANTHANIDE
STABILITY
EMISSION
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vorobyev S. A., Saikova S. V., Novikova S. A., Fetisova O. Y., Zharkov S. M., Krylov A. S., Likhatski M. N., Mikhlin Y. L.
Заглавие : Colloidal and immobilized nanoparticles of lead xanthates
Место публикации : ACS Omega. - 2019. - Vol. 4, Is. 7. - P.11472-11480. - ISSN 24701343 (ISSN), DOI 10.1021/acsomega.9b00841
Примечания : Cited References: 56. - This research was supported by Russian Science Foundation, project 18-17-00135.
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhou J., Luo J., Rong X., Wei P., Molokeev M. S., Huang Y., Zhao J., Liu Q., Zhang X., Tang J., Xia Z.
Заглавие : Lead-Free Perovskite Derivative Cs2SnCl6−xBrx Single Crystals for Narrowband Photodetectors
Место публикации : Adv. Opt. Mater. - 2019. - Vol. 7, Is. 10. - Ст.1900139. - ISSN 21951071 (ISSN), DOI 10.1002/adom.201900139
Примечания : 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).
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhou, Guojun, Jia, Xiaofang, Guo, Shaoqiang, Molokeev M. S., Zhang, Junying, Xia, Zhiguo
Заглавие : Role of Halogen Atoms on High-Efficiency Mn2+ Emission in Two-Dimensional Hybrid Perovskites
Место публикации : J. Phys. Chem. Lett. - 2019. - Vol. 10, Is. 16. - P.4706-4712. - ISSN 1948-7185, DOI 10.1021/acs.jpclett.9b01996
Примечания : 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).
Предметные 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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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Su, Binbin, Molokeev M. S., Xia, Zhiguo
Заглавие : Unveiling Mn2+ dopant states in two-dimensional halide perovskite toward highly efficient photoluminescence
Место публикации : J. Phys. Chem. Lett. - 2020. - Vol. 11, Is. 7. - P.2510-2517. - ISSN 1948-7185, DOI 10.1021/acs.jpclett.0c00593
Примечания : 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.
Предметные 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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