光致发光
化学
钙钛矿(结构)
卤化物
八面体
溴化物
锗
激子
紫外线
橙色(颜色)
分析化学(期刊)
无机化学
结晶学
晶体结构
光电子学
材料科学
凝聚态物理
硅
有机化学
物理
食品科学
作者
Nan He,Pifu Gong,Xingyu Zhang,Youquan Liu,Linfeng Dong,Zheshuai Lin
标识
DOI:10.1021/acs.inorgchem.2c03432
摘要
Hybrid organic-inorganic metal halide (OIMH) perovskites are regarded as potential photoluminescent (PL) materials and have attracted intensive attention. Here, we select 1-methylpiperazine as an organic component and successfully obtain a two-dimensional (2D) Ge-based OIMH perovskite, (1-mpz)GeBr4. It features a 2D layered structure composed of distorted [GeBr6]4- octahedra with organic (C5H14N2)2+ located between the layers. (1-mpz)GeBr4 exhibits strong orange color under ultraviolet (UV) light and possesses good PL stability for over 2 months. The photoluminescence quantum efficiency is measured to be 7.15% at room temperature, which is the largest among all reported low-dimensional Ge-based perovskites. Experimental measurements, combined with first-principles calculations, reveal that its PL property is attributed to self-trapped excitons (STEs) from [GeBr6]4- groups. From the deduced structure-property relationship, Ge-based OIMH PL perovskites with good stability and high PL efficiency can be expected.
科研通智能强力驱动
Strongly Powered by AbleSci AI