背光
光致发光
量子产额
卤化物
金属卤化物
发光
材料科学
猝灭(荧光)
光电子学
金属
分析化学(期刊)
液晶显示器
化学
荧光
光学
物理
无机化学
色谱法
冶金
作者
Guojun Zhou,Zhiyang Liu,Jinglong Huang,Maxim S. Мolokeev,Zewen Xiao,Chensheng Ma,Zhiguo Xia
标识
DOI:10.1021/acs.jpclett.0c01933
摘要
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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