Simultaneous Long-Persistent Blue Luminescence and High Quantum Yield within 2D Organic-Metal Halide Perovskite Micro/Nanosheets

被引:226
作者
Zhou, Bo [1 ]
Yan, Dongpeng [1 ,2 ]
机构
[1] Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China
[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
micro; nanosheets; persistent luminescence; perovskites; quantum yield; thermally activated delayed fluorescence; ACTIVATED DELAYED FLUORESCENCE; ROOM-TEMPERATURE PHOSPHORESCENCE; LIGHT-EMITTING-DIODES; OPTICAL WAVE-GUIDES; EFFICIENCY; EMISSION; DESIGN; FERROELECTRICITY; SEMICONDUCTOR; COMPLEXES;
D O I
10.1002/anie.201909760
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Molecular solid-state materials with long-lived luminescence (such as thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) systems) are promising for display, sensoring, and bio-imaging applications. However, the design of such materials that exhibit both long luminescent lifetime and high solid-state emissive efficiency remains an open challenge. Two-dimensional (2D) organic-metal halide perovskite materials have a high blue-emitting quantum yield of up to 63.55 % and ultralong TADF lifetime of 103.12 ms at ambient temperature and atmosphere. Our design leverages the combined influences of a 2D space/electronic confinement effect and a modest heavy-atom tuning strategy. Photophysical studies and calculations reveal that the enhanced quantum yield is due to the rigid laminate structure of perovskites, which can effectively inhibit the non-radiative decay of excitons.
引用
收藏
页码:15128 / 15135
页数:8
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