Pressure-Engineered Photoluminescence Tuning in Zero-Dimensional Lead Bromide Trimer Clusters

Qian Li; Zhongwei Chen; Mingze Li; Bin Xu; Jiang Han; Zhishan Luo; Li Tan; Zhiguo Xia; Zewei Quan

doi:10.1002/anie.202009237

Pressure-Engineered Photoluminescence Tuning in Zero-Dimensional Lead Bromide Trimer Clusters

Angew Chem Int Ed Engl. 2021 Feb 1;60(5):2583-2587. doi: 10.1002/anie.202009237. Epub 2020 Nov 27.

Authors

Qian Li¹, Zhongwei Chen¹, Mingze Li², Bin Xu¹, Jiang Han¹, Zhishan Luo¹, Li Tan¹, Zhiguo Xia^{2

3}, Zewei Quan¹

Affiliations

¹ 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.
² 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.
³ The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Technology, South China University of Technology, Guangzhou, Guangdong, 510641, China.

PMID: 33089955
DOI: 10.1002/anie.202009237

Abstract

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 [Pb₃ Br₁₁ ] (bmpy: 1-butyl-1-methylpyrrolidinium). Under initial compression, the simultaneous contraction and distortion of photoactive [Pb₃ Br₁₁ ]^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.

Keywords: high pressure; metal halides; photoluminescence; self-trapped exciton emission; trimer cluster.

Abstract

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