Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal

Hao Suo* (Co-first Author), Nan Wang (Co-first Author), Yu Zhang (Co-first Author), Xin Zhang, Jinmeng Xiang, Xiaojia Wang, Guansheng Xing, Dongxu Guo, Jiwen Chang, Yu Wang, Panlai Li, Zhijun Wang, Yuhai Zhang, Bing Chen, Shuzhou Li, Chongfeng Guo*, Feng Wang*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

31 Citations (Scopus)
20 Downloads (CityUHK Scholars)

Abstract

Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to the zero-dimensional nature of the crystal lattice that minimizes energy crosstalk, different excitonic states in the crystals can be selectively excited by ultraviolet light, X-ray irradiation, and mechanical action, enabling dynamic control of steady/transient-state spectral features by modulating the excitation modes. Remarkably, the transparent crystal exhibits highly efficient white photoluminescence (quantum yield >97%), X-ray excited blue emission with long afterglow (duration >9 h), and high-brightness self-reproducible violet-blue mechanoluminescence. These findings reveal the exceptional capability of low-dimensional perovskite crystals for integrating various excitonic luminescence, offering exciting opportunities for multi-level data encryption and all-in-one authentication technologies. © The Author(s) 2025.
Original languageEnglish
Article number21
Number of pages11
JournalLight: Science and Applications
Volume14
Online published2 Jan 2025
DOIs
Publication statusPublished - 2025

Funding

This work was supported by the National Natural Science Foundation of China (Nos. 12474402 and 12004093), the Hong Kong Innovation and Technology Commission through an Innovation and Technology Fund (MHP/038/22), the Central Government to Guide Local Scientific and Technological Development (236Z1013G), Hebei Province Optoelectronic Information Materials Laboratory Performance Subsidy Fund Project (No.22567634H). The authors thank Prof. Zewen Xiao at Huazhong University of Science and Technology for valuable discussion.

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