Temperature and pressure-responsive photoluminescence in a 1D hybrid lead halide  

作　　者：Huan Hu Ying Zhang Shi-Shuang Huang Zhi-Gang Li Yungui Liu Rui Feng Wei Li 

机构地区：[1]School of Materials Science and Engineering,Nankai University&TKL of Metal and Molecule Based Material Chemistry,Tianjin,300350,China [2]College of Gems and Materials,Hebei GEO University,Shijiazhuang,050031,China

出　　处：《Chinese Journal of Structural Chemistry》2024年第10期35-41,共7页结构化学(英文)

基　　金：support from the National Natural Science Foundation of China(Nos.22375105,21991143 and 42103034).

摘　　要：Low-dimensional hybrid lead halides with responsive emissions have attracted considerable attention due to their potential applications in sensing.Herein,a new one-dimensional hybrid lead bromide CyPbBr_(3)(Cy=cytosine cation)was synthesized to explore its emission evolution in response to temperature and pressure.The compound possesses an edge-sharing 1D double-chain structure and emits warm white light across nearly the entire visible spectrum upon ultraviolet excitation.This emission arises from the self-trapped excitons and its broadband feature is attributed to the strong electron-phonon coupling as revealed by the variable-temperature photoluminescence experiments.Moreover,a 4.5-fold pressure-induced emission enhancement was observed at 2.7 GPa which is caused by the pressure suppressed non-radiative energy loss.Furthermore,in-situ powder X-ray diffraction and Raman experiments reveal the maxima of the emission enhancement is associated with a phase transition at the same pressure.Our work demonstrates that low-dimensional metal halides are a promising class of stimuli-responsive materials which could have potential applications in temperature and pressure sensing.

关 键 词：Low-dimensional hybrid lead halides STIMULI-RESPONSIVE Self-trapped excitons Electron-phonon coupling Emission enhancement 

分 类 号：O62[理学—有机化学]