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Doped Lead Halide White Phosphors for Very High Efficiency and Ultra-High Color Rendering.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-12-12 , DOI: 10.1002/anie.201910180 Hailong Yuan 1, 2 , Florian Massuyeau 2 , Nicolas Gautier 2 , Antoine Blaise Kama 2, 3 , Eric Faulques 2 , Fei Chen 1 , Qiang Shen 1 , Lianmeng Zhang 1 , Michael Paris 2 , Romain Gautier 2
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-12-12 , DOI: 10.1002/anie.201910180 Hailong Yuan 1, 2 , Florian Massuyeau 2 , Nicolas Gautier 2 , Antoine Blaise Kama 2, 3 , Eric Faulques 2 , Fei Chen 1 , Qiang Shen 1 , Lianmeng Zhang 1 , Michael Paris 2 , Romain Gautier 2
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Near-UV-pumped white-light-emitting diodes with ultra-high color rendering and decreased blue-light emission is highly desirable. However, discovering a single-phase white light emitter with such characteristics remains challenging. Herein, we demonstrate that Mn doping as low as 0.027 % in the hybrid post-perovskite type (TDMP)PbBr4 (TDMP=trans-2,5-dimethylpiperaziniium) enables to achieve a bright pure white emission replicating the spectrum of the sun's rays. Thus, a white phosphor exhibiting an emission with CIE coordinates (0.330, 0.365), a high photoluminescence quantum yield of 60 % (new record for white light emission of hybrid lead halides), and an ultra-high color rendering index (CRI=96, R9=91.8), corresponding to the record value for a single phase emitter was obtained. The investigation of the photoluminescence properties revealed how free excitons, self-trapped excitons, and low amount of Mn dopants are coupled to give rise to such pure white emission.
中文翻译：
掺杂的卤化铅白色荧光粉，具有极高的效率和超高的显色性。
具有超高显色性和减少的蓝光发射的近紫外泵浦的白光发光二极管是非常需要的。然而，发现具有这种特性的单相白光发射器仍然具有挑战性。在这里，我们证明了在混合后钙钛矿型（TDMP）PbBr4（TDMP = trans-2,5-二甲基哌嗪鎓）中，Mn掺杂量可低至0.027％，从而能够实现复制太阳光线光谱的明亮纯白色发射。因此，白色荧光粉显示出具有CIE坐标（0.330，0.365）的发射，60％的高光致发光量子产率（混合卤化铅白光发射的新记录）和超高显色指数（CRI = 96） ，R9 = 91.8），对应于单相发射器的记录值。
更新日期：2020-01-16
中文翻译：
掺杂的卤化铅白色荧光粉，具有极高的效率和超高的显色性。
具有超高显色性和减少的蓝光发射的近紫外泵浦的白光发光二极管是非常需要的。然而，发现具有这种特性的单相白光发射器仍然具有挑战性。在这里，我们证明了在混合后钙钛矿型（TDMP）PbBr4（TDMP = trans-2,5-二甲基哌嗪鎓）中，Mn掺杂量可低至0.027％，从而能够实现复制太阳光线光谱的明亮纯白色发射。因此，白色荧光粉显示出具有CIE坐标（0.330，0.365）的发射，60％的高光致发光量子产率（混合卤化铅白光发射的新记录）和超高显色指数（CRI = 96） ，R9 = 91.8），对应于单相发射器的记录值。
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