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Автор(ы) : Zhou, Guojun, Liu, Zhiyang, Huang, Jinglong, Molokeev M. S., Xiao, Zewen, Ma, Chonggeng, Xia, Zhiguo
Заглавие : Unraveling the near-unity narrow-band green emission in zero-dimensional Mn2+-based metal halides: a case study of (C10H16N)2Zn1–xMnxBr4 solid solutions
Место публикации : J. Phys. Chem. Lett. - 2020. - Vol. 11, Is. 15. - P.5956-5962. - ISSN 1948-7185, DOI 10.1021/acs.jpclett.0c01933
Примечания : Cited References: 32. - This work was supported by the National Natural Science Foundations of China (Grant No. 51972118, 51961145101, and 51722202), Fundamental Research Funds for the Central Universities (D2190980), Guangzhou Science & Technology Project (202007020005), the Guangdong Provincial Science & Technology Project (No. 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. 19-5280003. C. Ma acknowledges the support from the Innovation and Entrepreneurship Programs for Returned Overseas Chinese Scholars offered by Chongqing Bureau of Human Resources and Social Security (CX2019055). Z. Xiao acknowledges the financial support from the Thousand Young Talents Program of China, the Startup Fund of Huazhong University of Science and Technology, and the Director Fund of Wuhan National Laboratory for Optoelectronics
Предметные рубрики: Organic-inorganic hybrid
Light emission
White
Br
Аннотация: Zero-dimensional (0D) Mn2+-based metal halides are potential candidates as narrow-band green emitters, and thus it is critical to provide a structural understanding of the photophysical process. Herein, we propose that a sufficiently long Mn–Mn distance in 0D metal halides enables all Mn2+ centers to emit spontaneously, thereby leading to near-unity photoluminescence quantum yield. Taking lead-free (C10H16N)2Zn1–xMnxBr4 (x = 0–1) solid solution as an example, the Zn/Mn alloying inhibits the concentration quenching that is caused by the energy transfer of Mn2+. (C10H16N)2MnBr4 exhibits highly thermal stable luminescence even up to 150 °C with a narrow-band green emission at 518 nm and a full width at half maximum of 46 nm. The fabricated white light-emitting diode device shows a high luminous efficacy of 120 lm/W and a wide color gamut of 104% National Television System Committee standard, suggesting its potential for liquid crystal displays backlighting. These results provide a guidance for designing new narrow-band green emitters in Mn2+-based metal halides.
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