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    Unraveling the ultrafast self-assembly and photoluminescence in zero-dimensional Mn2+-based halides with narrow-band green emissions / G. Zhou, Q. Ren, M. S. Molokeev [et al.] // ACS Appl. Electron. Mater. - 2021. - Vol. 3, Is. 9. - P. 4144-4150, DOI 10.1021/acsaelm.1c00606. - Cited References: 37. - This work is supported by the Natural Science Foundation of China (no. 21871167) and the 1331 project of Shanxi Province and funded by RFBR according to the research project no. 19-52-80003 . - ISSN 2637-6113
   Перевод заглавия: Открытие сверхбыстрой самосборки и фотолюминесценции в галогенидах на основе Mn2+ с нулевой размерностью и узкополосной зеленой эмиссией
Кл.слова (ненормированные):
zero-dimensional Mn2+-based halides -- ultrafast self-assembly -- photoluminescence -- white LEDs -- solid-state displays
Аннотация: The discovery of narrow-band luminescent materials remains an immense challenge to optimize the performance of white light-emitting diodes (LEDs). So far, the zero-dimensional (0D) Mn2+-based halides with near-unity narrow-band emissions have emerged as a class of promising phosphors in solid-state displays, but the related large-scale synthesis strategies have not been proposed and evaluated. Herein, we report an in situ synthetic process of 0D Mn2+-based halides and utilize (C20H20P)2MnBr4 as a case to investigate the photoluminescence characteristics and the structural essence of ultrafast self-assembly. The bright green emission peak at 523 nm with a full width at half maximum of 48 nm for (C20H20P)2MnBr4 is attributed to the d–d transition (4T1–6A1) of tetrahedrally coordinated [MnBr4]2– centers, and the fabricated white LED device shows a wide color gamut of 103.7% National Television System Committee (NTSC) standard. Remarkably, the experimental and theoretical results indicate that there are hydrogen bonding of C–H···Br and weak van der Waals interactions between [C20H20P]+ and [MnBr4]2–, resulting in the root for the realization of ultrafast self-assembly in 0D Mn2+-based halides. This work reveals a feasible and general synthesis method for preparing 0D Mn2+-based halides, thereby providing a possibility for their industrial application in solid-state displays.

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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, Linfen, 041004, 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
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
State Key Lab. of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China
Coll. of Chem. and Chem. Eng., Key Lab. of Interface Sci. and Eng. in Adv. Mat., Min. of Education, Taiyuan University of Technology, Shanxi, Taiyuan, 030024, China

Доп.точки доступа:
Zhou, G.; Ren, Q.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhou, Y.; Zhang, J.; Zhang, X. -M.
}
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    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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    Manipulation of Cl/Br transmutation in zero-dimensional Mn2+-based metal halides toward tunable photoluminescence and thermal quenching behaviors / G. J. Zhou, Z. Y. Liu, M. S. Molokeev [et al.] // J. Mater. Chem. C. - 2021. - Vol. 9, Is. 6. - P. 2047-2053, DOI 10.1039/d0tc05137c. - Cited References: 56. - The present work was financially supported by the Natural Science Foundation of China (21871167), and 1331 Project of Shanxi Province and the Postgraduate Innovation Project of Shanxi Normal University (2019XBY018), and funded by RFBR according to the research project no. 19-52-80003 . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Манипуляции перестановок Cl/Br в нульмерных галогенидах металлов на основе Mn2+ для настраиваемой фотолюминесценции и ослабления термического тушения

РУБ Materials Science, Multidisciplinary + Physics, Applied

Аннотация: Low-dimensional-networked metal halides are attractive for the screening of emitters applied in solid-state lighting and displays, but the lead toxicity and poor stability are obstacles that must be overcome in industrial applications. Herein, we aim at the discovery of bright and stable photoluminescence in zero-dimensional (0D) Mn2+-based metal halides. By manipulation of Cl/Br transmutation, the nature of the halogen can be confirmed as a pivotal factor to tune the PL behaviors, and the optimum Mn2+ emission with a high PLQY of 99.8% and a short lifetime of 0.372 ms can be achieved in (C24H20P)2MnBr4. The thermal quenching behaviors have been discussed in depth, indicating that the synergistic effect of good chemical stability of organic groups, a long Mn⋯Mn distance of 10.447 Å and a relatively large activation energy (ΔE = 0.277 eV) provides a platform for achieving excellent thermal stability in (C24H20P)2MnBr4. Moreover, the as-fabricated white LED device with a high luminous efficacy of 118.9 lm W−1 and a wide color gamut of 105.3% National Television System Committee (NTSC) shows that (C24H20P)2MnBr4 can be employed as a desirable narrow-band green emitter for LED displays. This work provides a new understanding of fine tailoring halogens, and proposes a feasible approach to achieving high thermal stability emitters toward the targeted practical applications.

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Держатели документа:
Shanxi Normal Univ, Sch Chemist & Mat Sci, Key Lab Magnet Mol & Magnet Informat Mat, Minist Educ, Linfen 041004, Shanxi, Peoples R China.
Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, 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.
South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Peoples R China.
South China Univ Technol, Inst Opt Commun Mat, Guangzhou 510641, Peoples R China.

Доп.точки доступа:
Zhou, Guojun; Liu, Zhiyang; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xiao, Zewen; Xia, Zhiguo; Zhang, Xian-Ming
}
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    Broadband light emitting zero-dimensional antimony and bismuth-based hybrid halides with diverse structures / C. K. Deng, S. Q. Hao, K. J. Liu [et al.] // J. Mater. Chem. C. - 2021. - Vol. 9, Is. 44. - P. 15942-15948, DOI 10.1039/d1tc04198c. - Cited References: 52. - This work was supported by Beijing Municipal Natural Science Foundation (2182080) and the National Natural Science Foundation of China (51972021 and 51702329). The work was partly supported by the Fundamental Research Funds for the Central Universities (FRF-IDRY-19-005) and by the RFBR according to the research project No. 19-52-80003. S. H. and C. W. (DFT calculations) acknowledge support from the Department of Energy, Office of Science Basic Energy Sciences under Grant DE-SC0014520. Access to QUEST, the supercomputing resources facilities at Northwestern University, is also acknowledged . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Широкополосное излучение от нульмерных гибридных галогенидов на основе сурьмы и висмута с разнообразной структурой

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
CRYSTAL-STRUCTURE
   LONE-PAIR
   EMISSION
   PEROVSKITES
   TIN
   LUMINESCENCE
Аннотация: Low-dimensional organic–inorganic metal halides have recently attracted extensive attention because of their various structures and distinguished photoelectric properties. Herein, we report a series of new zero-dimensional organic–inorganic hybrid metal halides: (TMEDA)3Bi2Cl12·H2O, (TMEDA)3Bi2Br12·H2O, (TMEDA)3Sb2Br12·H2O, and (TMEDA)5Sb6Cl28·2H2O [TMEDA = N,N,N′·trimethylethylenediamine]. (TMEDA)3M2X12·H2O (M = Bi or Sb, X = Cl or Br) crystallizes in the monoclinic space group P21/n, and (TMEDA)5Sb6Cl28·2H2O crystallizes in the orthorhombic space group Pnma. (TMEDA)3M2X12 possesses a zero-dimensional structure with the metal halide ions of [MBr6]3− isolated by the organic TMEDA2+ cations. Interestingly, the (TMEDA)5Sb6Cl28·2H2O structure consists of a combination of corner-connected octahedra [Sb4Cl18]6− and edge-shared [Sb2Cl10]4−, which is quite rare. The light emission of all these compounds was measured, and (TMEDA)3Sb2Br12·H2O exhibits the most intense luminescence. Upon 400 nm ultraviolet light excitation, (TMEDA)3Sb2Br12·H2O exhibited strong broadband yellow emission centered at 625 nm with a full-width at half-maximum of ∼150 nm originating from self-trapped excitons. This work suggests the possibility of new types of hybrid halides by introducing different metal centers and probing the structural evolution and photoluminescent properties, serving as a reference for the relationship between structure and luminescent performance and demonstrating their potential use as phosphors in light-emitting diodes.

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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.
Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
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.
Shanxi Normal Univ, Sch Chem & Mat Sci, Key Lab Magnet Mol & Magnet Informat Mat, Minist Educ, Linfen 041004, Shanxi, Peoples R China.

Доп.точки доступа:
Deng, Chenkai; Hao, Shiqiang; Liu, Kunjie; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wolverton, Christopher; Fan, Liubing; Zhou, Guojun; Chen, D.a.; Zhao, Jing; Liu, Quanlin; Beijing Municipal Natural Science FoundationBeijing Natural Science Foundation [2182080]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51972021, 51702329]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [FRF-IDRY-19-005]; RFBRRussian Foundation for Basic Research (RFBR) [19-52-80003]; Department of Energy, Office of Science Basic Energy SciencesUnited States Department of Energy (DOE) [DE-SC0014520]
}
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    Magnetoelastic Resonance in Zero-Mean Magnetostrictive Media / V. A. Ignatchenko, D. S. Polukhin // TRENDS IN MAGNETISM / . - STAFA-ZURICH : TRANS TECH PUBLICATIONS LTD, 2011. - Vol. 168-169. - P. 101-104. - (Solid State Phenomena), DOI 10.4028/www.scientific.net/SSP.168-169.101. - Cited Reference Count: 7 . - ISBN 1012-0394
Рубрики:
Materials Science, Multidisciplinary
   Physics, Condensed Matter
Кл.слова (ненормированные):
spin waves -- elastic waves -- magnetoelastic coupling -- inhomogeneities -- self-consistent approximation -- dynamic susceptibility
Аннотация: The interaction between two wave fields of different nature that are caused by rms fluctuations of the coupling parameter between these fields in media with zero-mean coupling parameter is. considered. Taking into consideration the multiple scattering processes of waves on the inhomogeneities leads to the results considerably different from those that have been obtained for the same situation in the Bourret approximation earlier [4,5]. Instead of the degeneration removal of frequencies in the wave spectrum and the appearance of two resonance peaks in the dynamic susceptibility at the intersection of the initial dispersion laws, the sharp broadening of the self-mode peak has to be observed. The consideration is done by the example of magnetoelastic waves in zero-mean magnetostrictive media.

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Держатели документа:
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Euro-Asian Symposium "Trends in MAGnetism"(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); Russian Acad Sci, Inst Metal Phys
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    Coordination units of Mn2+ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes / G. J. Zhou, J. L. Ding, X. X. Jiang [et al.] // J. Mater. Chem. C. - 2022. - Vol. 10, Is. 6. - P. 2095-2102, DOI 10.1039/d1tc05680h. - Cited References: 57. - The present work was supported by the Natural Science Foundation of China (21871167), the 1331 Project of Shanxi Province and the Postgraduate Innovation Project of Shanxi Normal University (2019XBY018), the Beijing Natural Science Foundation (No. 2214068) and funded by RFBR according to the research project no. 19-52-80003 . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Модуляция координационных блоков с Mn2+ для управляемой люминесценции в нульмерных бромидах для белых светодиодов

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
HALIDE PEROVSKITE NANOCRYSTALS
RECENT PROGRESS
DOPING MN2+
Аннотация: Organic–inorganic metal halides have become a multifunctional platform for manipulating photoluminescence due to highly efficient and tunable emissions, especially for lead-free Mn2+-based halides. Herein, the zero-dimensional (0D) bromides of (C5H14N3)2MnBr4 and (CH6N3)2MnBr4 with different coordination environments were designed and synthesized by a solvent evaporation method. They exhibit green and red broadband emission peaks at 528 nm and 627 nm with high photoluminescence quantum yields of 86.83% and 61.91%, respectively, which are attributed to the d–d transition (4T1(G) → 6A1(S)) of [MnBr4]2− tetrahedral and [Mn3Br12]6− octahedral units. The cases emphasize the effect of organic ligands on the intrinsic emissions of Mn2+ ions, thereby revealing the luminescence mechanism of Mn2+ ions in 0D isolated structures through the Tanabe–Sugano (TS) energy diagram. Thanks to their bright and stable emissions, the fabricated white light-emitting diode (LED) based on (C5H14N3)2MnBr4 and (CH6N3)2MnBr4 provides an outstanding color rendering index (Ra) of 90.8 at a correlated color temperature (CCT) of 3709 K, along with the CIE chromaticity coordinates of (0.3985, 0.3979) and a luminous efficacy of 51.2 lm W−1. This work aims at clarifying the relationship between the coordination units of Mn2+ and tunable emissions, and in particular, proposes a new strategy to explore phosphors excited by blue light for white LEDs.

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Держатели документа:
Shanxi Normal Univ, Sch Chem & Mat Sci, Key Lab Magnet Mol & Magnet Informat Mat, Minist Educ, Taiyuan 030006, Peoples R China.
Chinese Acad Sci, China Tech Inst Phys & Chem, Beijing 100190, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.
Beijng Technol & Business Univ, Dept Phys, Beijing 100048, Peoples R China.
Taiyuan Univ Technol, Coll Chem & Chem Engn, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Shanxi, Peoples R China.

Доп.точки доступа:
Zhou, Guojun; Ding, Jialiang; Jiang, Xingxing; Zhang, Jian; Molokeev, M. S.; Молокеев, Максим Сергеевич; Ren, Qiqiong; Zhou, Jun; Li, Shili; Zhang, Xian-Ming
}
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    Machine learning analysis and discovery of zero-dimensional ns2 metal halides toward enhanced photoluminescence quantum yield / M. S. Molokeev, B. B. Su, A. S. Aleksandrovsky [et al.] // Chem. Mat. - 2022. - Vol. 34, Is. 2. - P. 537-546, DOI 10.1021/acs.chemmater.1c02725. - Cited References: 66. - This work is supported by the National Natural Science Foundation of China (51961145101 and 51972118), International Cooperation Project of National Key Research and Development Program of China (2021YFE0105700), Guangzhou Science and Technology Project (202007020005), 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. - ISSN 1520-5002
   Перевод заглавия: Машинное обучение и открытие нульмерных ns2 металлогалогенидов для увеличения квантового выхода фотолюминесценции

РУБ Chemistry, Physical + Materials Science, Multidisciplinary
Рубрики:
RANDOM FOREST
   CRYSTAL-STRUCTURE
   TIN BROMIDE
   CLASSIFICATION
Аннотация: The dependence of photoluminescence quantum yield (PLQY) on the crystal structure of existing zero-dimensional ns2 metal halides is analyzed with the help of principal component analysis and random forest methods. The primary role of the distance between metal ions in different compounds is revealed, and the influence of other structural features such as metal-halogen distance and the distortion of metal-halogen polyhedrons are quantified. Accordingly, the two previously unknown Sb3+-based zero-dimensional metal halides were synthesized to verify the obtained model. Experimental studies of the two compounds demonstrated good agreement with the predictions, and the PLQY of (C10H16N)2SbCl5 is found to be 96.5%. Via machine learning analysis, we demonstrate that concentration quenching is the main factor that determines PLQY for all s2 ion metal halides, which will accelerate the discovery of new luminescence metal halides.

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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 & Engn, Guangzhou 510641, Peoples R China.
RAS, KSC, SB, Lab Coherent Opt,Kirensky Inst Phys,Fed Res Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Kemerovo State Univ, Dept Res & Dev, Kemerovo 650000, Russia.

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Su, Binbin; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Golovnev, Nicolay N.; Plyaskin, M. E.; Пляскин, Михаил Е.; Xia, Zhiguo
}
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    Halogen substitution in zero-dimensional mixed metal halides toward photoluminescence modulation and enhanced quantum yield / M. Z. Li, Y. W. Li, M. S. Molokeev [et al.] // Adv. Opt. Mater. - 2020. - Vol. 8, Is. 16. - Ст. 2000418, DOI 10.1002/adom.202000418. - Cited References: 34. - M.L., Y.L. contributed equaly to this work. This work was supported by the National Natural Science Foundation of China (51961145101, 51972118, and 51722202), Fundamental Research Funds for the Central Universities (FRFTP-18-002C1), the Guangdong Provincial Science &Technology Project (2018A050506004), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01 x 137). This work was also funded by RFBR according to the research project No. 19-52-80003. The work at Jilin University is supported by the National Natural Science Foundation of China (Grant No. 61722403 and 11674121) and Jilin Province Science and Technology Development Program (Grant No. 20190201016JC). Calculations were performed in part at the high performance computing center of Jilin University. . - ISSN 2195-1071
   Перевод заглавия: Замена галогена в смешанных галогенидах металлов с нулевой размерностью для модуляции фотолюминесценции и увеличения квантового выхода

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
WHITE-LIGHT EMISSION
PEROVSKITES
EXCITONS
Кл.слова (ненормированные):
halogen substitution -- hybrid metal halides -- photoluminescene quantum yield
Аннотация: Zero‐dimensional (0D) organic−inorganic hybrid metal halides haveunprecedented degrees of freedom for structural tunability and photoluminescence modulation. Here, the 0D isomorphic hybrid metal mixed halides (C9NH20)9Pb3Zn2Br19(1−x )Cl19x (x = 0–1) with continuous halogen contents control, exhibiting tunable emission and enhancement of photoluminescence quantum yield (PLQY) are reported. The competitive bromine to chlorine substitution process in (C9NH20)9Pb3Zn2Br19(1−x )Cl19x occurs first in [ZnBr4−x Clx ]2− tetrahedron before the [Pb3Br11−x Clx ]5− trimer. The increasing Cl content in samples from x = 0 to 1 results in an expected blue shift of emission peak from 565 to 516 nm, and meanwhile a strikingly room temperature PL quantum yield increase from 8% to 91%. Combined experimental characterizations and theoretical calculations indicate that the blue shift of interband transition energy is responsible for the emission peak shift. Moreover, with the increasing Cl content, the enhanced electron−phonon interaction and the weakened thermal‐assisted nonradiative recombination result in more efficient radiative transition channels and ultimately enhanced PLQY. The impact of halogen substitution on electronic structures and optical properties in 0D hybrid metal halides is emphasized in this work as a new strategy to promote the future development of new luminescent materials.

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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.
Jilin Univ, Coll Mat Sci & Engn, Key Lab Automobile Mat MOE, State Key Lab Integrated Optoelect, Changchun 130012, 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.
South China Univ Technol, Inst Opt Commun Mat, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Guangdong, Peoples R China.

Доп.точки доступа:
Li, Mingze; Li, Yawen; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhao, Jing; Na, Guangren; Zhang, Lijun; Xia, Zhiguo
}
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    Tunable photoluminescence in Sb3+-doped zero-dimensional hybrid metal halides with intrinsic and extrinsic self-trapped excitons / J. Zhou, M. Z. Li, M. S. Molokeev [et al.] // J. Mater. Chem. C. - 2020. - Vol. 8, Is. 15. - P. 5058-5063, DOI 10.1039/d0tc00391c. - Cited References: 33. - This work is supported by the National Natural Science Foundation of China (No. 51722202, 51961145101, 51972118, 21576002 and 61705003), Fundamental Research Funds for the Central Universities (D2190980), the Guangdong Provincial Science & Technology Project (2018A050506004), and Beijing Technology and Business University Research Team Construction Project (No. PXM2019_014213_000007). This work was also funded by RFBR according to the Research Project No. 19-52-80003. . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Перестраиваемая фотолюминесценция в нульмерных гибридных металлогалогенидах, легированных Sb3 +, с внутренними и внешними автолокализованными экситонами

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
WHITE-LIGHT EMISSION
   LUMINESCENCE
   PEROVSKITES
   CS2NASCCL6
   CS2NAYCL6
Аннотация: Dopants in luminescent metal halides provide an alternative way for photoluminescence tuning towards versatile optical applications. Here we report a trivalent antimony (Sb3+)-doped single crystalline 0D metal halide with the composition of (C9NH20)9[Pb3Cl11](ZnCl4)2:Sb3+. This compound possessed the coexistence of two emission centers including intrinsic and extrinsic self-trapped excitons (STEs), which are ascribed to [Pb3Cl11]5− clusters and triplet STEs formed by the 3P1–1S0 transition of Sb3+. By regulating the Sb3+ concentration, the emission can be tuned from green to yellow and finally to orange, which would help to develop optically pumped white light-emitting diodes (WLEDs) with different photometric characteristics. Moreover, this dopant-induced extrinsic STE approach presents a new direction towards tuning the luminescence properties of 0D metal halides, and may find application in environmentally-friendly, high-performance metal halide light emitters.

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Держатели документа:
Beijing Technol & Business Univ, Sch Sci, Beijing 100048, Peoples R China.
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China.
RAS, 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, Peoples R China.
South China Univ Technol, Inst Opt Commun Mat, Guangzhou 510641, Peoples R China.

Доп.точки доступа:
Zhou, Jun; Li, Mingze; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sun, Jiayue; Xu, Denghui; Xia, Zhiguo
}
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10.

    Optical functional units in zero-dimensional metal halides as a paradigm of tunable photoluminescence and multicomponent chromophores / M. Z. Li, M. S. Molokeev, J. Zhao, Z. G. Xia // Adv. Opt. Mater. - 2020. - Vol. 8, Is. 8. - Ст. 1902114, DOI 10.1002/adom.201902114. - Cited References: 38. - This work was supported by the National Natural Science Foundation of China (Nos. 51961145101, 51722202, and 51972118), Fundamental Research Funds for the Central Universities (D2190980), the Guangdong Provincial Science & Technology Project (2018A050506004), and this work was also funded by RFBR according to the Research Project No. 19-52-80003 . - ISSN 2195-1071
   Перевод заглавия: Оптические функциональные элементы в 0D металлгалогенидах как парадигма перестраиваемой фотолюминесценции многокомпонентных хромофоров

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
PEROVSKITES
   LUMINESCENCE
   ABSORPTION
   EMISSION
Кл.слова (ненормированные):
hybrid metal halides -- optical functional applications -- structural design
Аннотация: Zero-dimensional (0D) organic–inorganic hybrid luminescent metal halides have many promising optoelectronic applications; however, the single building unit in the 0D framework restricts their multimode optical control and photoluminescence tuning. Thus, it remains urgent but challenging to rationally design distinct anionic polyhedral with different optical functions and further expand this family by an equivalent cation substitution and halogen replacement. Herein, (C9NH20)9[Pb3X11](MX4)2 (X = Br and Cl, M = Mn, Fe, Co, Ni, Cu, and Zn) is successfully synthesized verifying the rationality of the design philosophy, and the optical characterizations demonstrate the effects of X‐position anions and M‐position cations on luminescence process. Intriguingly, both [Pb3X11]5− and [MX4]2− perform as inorganic building units in this 0D system and optically active centers, in which the former leads to high‐efficiency broad‐band yellow/green emission originating from self‐trapped excitons and the as‐observed multicomponent chromophores are derived from the absorption of the latter in the visible light region. The present work highlights the importance of different optical functional units showing synergistic effects on the physical properties and inspires future studies to explore multifunctional application of 0D luminescent metal halides.

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Читать в сети ИФ
Держатели документа:
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, 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.
South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Peoples R China.
South China Univ Technol, Inst Opt Commun Mat, Guangzhou 510641, Peoples R China.

Доп.точки доступа:
Li, Mingze; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhao, Jing; Xia, Zhiguo
}
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