Pressure‐Engineered Photoluminescence Tuning in Zero‐Dimensional Lead Bromide Trimer Clusters,Angewandte Chemie International Edition

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Pressure‐Engineered Photoluminescence Tuning in Zero‐Dimensional Lead Bromide Trimer Clusters
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-10-22 , DOI: 10.1002/anie.202009237
Qian Li ₁ , Zhongwei Chen ₁ , Mingze Li ₂ , Bin Xu ₁ , Jiang Han ₁ , Zhishan Luo ₁ , Li Tan ₁ , Zhiguo Xia _{2,

3} , Zewei Quan ₁

Affiliation

Zero‐dimensional (0D) hybrid metal halides are promising light emitters. However, it is still challenging to accurately design their structures with targeted photoluminescence properties. Herein, high pressure is used to change the self‐trapped exciton (STE) emission of 0D (bmpy)₉[ZnBr₄]₂[Pb₃Br₁₁] (bmpy: 1‐butyl‐1‐methylpyrrolidinium). Under initial compression, the simultaneous contraction and distortion of photoactive [Pb₃Br₁₁]⁵⁻ vary the equilibrium of STE emissions between different excited states, tuning the emission color from yellow green to cyan. Notably, sufficient structural distortion under continuous compression leads to the formation of more and deeper STE states, exhibiting an unprecedented broadband white‐light emission. This study reveals the structure‐dependent optical properties of 0D hybrid metal halides, providing novel insights into the mechanism of STE emission.

中文翻译：

零维溴化铅三聚体簇中的压力工程光致发光调谐

零维（0D）杂化金属卤化物是有前途的发光体。然而，准确设计具有目标光致发光性质的结构仍然是挑战。此处，高压用于改变0D（弹力）₉ [ZnBr ₄ ] ₂ [Pb ₃ Br ₁₁ ]（弹力：1-丁基-1-甲基吡咯烷鎓）的自陷激子（STE）发射。在初始压缩下，光活性[Pb ₃ Br ₁₁ ] ⁵⁻的同时收缩和畸变改变不同激发态之间STE发射的平衡，将发射颜色从黄绿色调整为青色。值得注意的是，在连续压缩下充分的结构变形会导致形成更多，更深的STE状态，从而展现出前所未有的宽带白光发射。这项研究揭示了0D杂化金属卤化物的结构依赖性光学性质，为STE发射机理提供了新颖见解。

更新日期：2020-10-22

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