光致发光
量子产额
材料科学
卤化物
兴奋剂
发光
钙钛矿(结构)
密度泛函理论
吸收(声学)
单重态
激子
结晶学
无机化学
荧光
化学
原子物理学
计算化学
凝聚态物理
光学
光电子学
激发态
物理
复合材料
作者
Zhongyuan Li,Bin Li,Wuqi Liu,Dong Yan,Qiang Tang,Zhen Fang,Rong‐Jun Xie
标识
DOI:10.1002/adom.202203031
摘要
Abstract Mn 2+ ‐activated halide double perovskites (HDPs) are found to show promising luminescent behavior and have great potential for optoelectronic applications. However, such interesting materials hitherto are only limited to compounds with a monotonous three‐dimensional structure and show a low photoluminescence quantum yield (PLQY). Herein, an Mn 2+ ‐doped two‐dimensional (2D) layered HDP PPA 4 NaInCl 8 (PPA + = C 6 H 5 (CH 2 ) 3 NH 3 + ) showing promising photoluminescence properties is reported. The large separation between the adjacent inorganic sheets and the good dissolution of Mn 2+ in the layered structure endow PPA 4 NaInCl 8 :Mn 2+ with efficient red emission and a record PLQY of 69.90%. The spectroscopic analyses and density functional theory calculations indicate that the inherent absorption and luminescence stem from the inserted organic cations PPA + in PPA 4 NaInCl 8 . An energy transfer process occurs between the singlet excitons from PPA + and Mn 2+ , resulting in tunable emission accompanied by the variation of Mn 2+ concentration. These results provide several new fundamental insights on doping and doped 2D layered HDPs, which enhances the understanding of structure−property relations in this important family.
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