(Benzimidazolium)2GeI4:A layered two-dimensional perovskite with dielectric switching and broadband near-infrared photoluminescence

作     者：Xuan Zhu Lin Zhou Xiao-Yun Huang Yan-Ling Luo Xin Deng Xin Yan Yan-Juan Wang Yan Qin Yuan-Yuan Tang Xuan Zhu;Lin Zhou;Xiao-Yun Huang;Yan-Ling Luo;Xin Deng;Xin Yan;Yan-Juan Wang;Yan Qin;Yuan-Yuan Tang

作者机构：Ordered Matter Science Research CenterNanchang UniversityNanchang330031People's Republic of China 

出 版 物：《结构化学》 (Chinese Journal of Structural Chemistry)

年 卷 期：2024年第43卷第6期

页      面：45-49页

核心收录：

学科分类：08[工学] 0703[理学-化学] 0813[工学-建筑学] 081301[工学-建筑历史与理论] 

基　　金：国家自然科学基金 

主　　题：Dielectric switching Photoluminescence Two-dimensional perovskite Lead-free perovskite 

摘      要：Two-dimensional(2D)lead halide perovskites have attracted tremendous attention due to their outstanding physical ***,the presence of toxic lead is a major problem for large-scale ***,we report the synthesis,phase transition,dielectric and photoluminescence(PL)properties of a lead-free 2D Ge-based perovskite(BIM)2GeI4(BIM=benzimidazolium)which experiences a phase transition at 405 K accompanied by an order-disorder change of organic ***,the step-like dielectric transition near the phase transition temperature makes it suitable for dielectric ***,(BIM)2GeI4 has a direct bandgap of 2.23 eV and broadband emission from 550 to 1000 nm,implying its unique optical property for potential near-infrared lighting and *** work provides a fresh example for the development of lead-free 2D Ge-based perovskite with potential applications in the fields of optoelectronics and high temperature dielectric switching.