零维溴化铅三聚体簇中的压力工程光致发光调谐
Pressure-Engineered Photoluminescence Tuning in Zero-Dimensional Lead Bromide Trimer Clusters.
作者信息
Li Qian, Chen Zhongwei, Li Mingze, Xu Bin, Han Jiang, Luo Zhishan, Tan Li, Xia Zhiguo, Quan Zewei
机构信息
Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China.
The Beijing Municipal Key Laboratory of New Energy, Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
出版信息
Angew Chem Int Ed Engl. 2021 Feb 1;60(5):2583-2587. doi: 10.1002/anie.202009237. Epub 2020 Nov 27.
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) [ZnBr ] [Pb Br ] (bmpy: 1-butyl-1-methylpyrrolidinium). Under initial compression, the simultaneous contraction and distortion of photoactive [Pb Br ] 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.
零维（0D）混合金属卤化物是很有前景的发光体。然而，精确设计具有靶向光致发光特性的其结构仍然具有挑战性。在此，利用高压来改变0D（bmpy）[ZnBr ] [Pb Br ]（bmpy：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 Br ]的同时收缩和畸变改变了不同激发态之间STE发射的平衡，将发射颜色从黄绿色调至青色。值得注意的是，在持续压缩下足够的结构畸变导致形成更多且更深的STE态，呈现出前所未有的宽带白光发射。这项研究揭示了0D混合金属卤化物的结构依赖性光学性质，为STE发射机制提供了新的见解。
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