文献类型：期刊文献

中文题名：晶格畸变增强卤化锑晶体团簇的自陷激子发射

英文题名：Lattice distortion enhanced self-trapped excitons emission in antimony halide crystalline clusters

作者：Liu, Da[1];He, Jingjing[2];Sun, Yuting[1];Liu, Xinyi[1];Peng, Yu[1];Li, Qing[1];Yang, Hua Gui[1];Niu, Qiang[2];Yang, Shuang[1];Hou, Yu[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[2]Inner Mongolia Erdos Elect Power & Met Grp Co Ltd, China Natl Enterprise Technol Ctr, Ordos 016064, Peoples R China

年份：2025

卷号：68

期号：1

起止页码：132

外文期刊名：SCIENCE CHINA-MATERIALS

收录：;EI(收录号：20244417285764);WOS:【SCI-EXPANDED(收录号:WOS:001343622800002)】；

基金：This work was financially supported by the National Ten Thousand Talent Program for Young Top-notch Talent, the National Natural Science Foundation of China (22379044 and 52203330), Shanghai Pilot Program for Basic Research (22TQ1400100-5), "Dawn" Program of Shanghai Education Commission (22SG28), Shanghai Municipal Natural Science Foundation (22ZR1418000), Shanghai Sailing Program (22YF1410000), the Postdoctoral Research Foundation of China (2021M701190), the Fundamental Research Funds for the Central Universities (JKD01241607 and JKVD1241041), the Major Science and Technology Projects of Inner Mongolia Autonomous Region (2021ZD0042), Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400), and Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism.

语种：中文

外文关键词：self-trapped excitons; zero-dimensional perovskite; antimony halides; lattice distortion; photoluminescence quantum yield

摘要：Zero-dimensional perovskite materials, characterized by broadband emission caused by self-trapped excitons, are promising materials for stimuli-responsive and photo-writeable encryption. However, existing research is focused on the effects of structural phase transitions on photophysical properties, and lacks in-depth understanding of the mechanisms of self-trapped excitons emission. Here, we demonstrate that the dehydration reaction in zero-dimensional antimony halide clusters significantly enhances the self-trapped excitons emission without inducing structural phase transition, resulting in a substantial increase in photoluminescence (PL) quantum yield from 3.5% to 91.4%. In-situ X-ray diffraction and PL techniques were employed to shed light on the relationship between the crystal structure and radiative recombination, demonstrating the introduction of rich lattice distortion during the dehydration process. Temperature-dependent PL spectra and transient absorption spectra suggest that the lattice distortion causes the moderate electron-phonon coupling strength and high exciton binding energy, facilitating self-trapped excitons to relax from the non-radiative recombination singlet state to the radiative recombination triplet state, corresponding to the enhanced emission intensity. As a proof of concept, several switchable PL applications have been established in scenarios such as anti-counterfeiting, rewritable luminescent paper, and humidity sensing. This finding elucidates the emission mechanism of self-trapped excitons and provides a novel avenue for designing switchable luminescent materials.