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