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Perovskite CsPb 2 Br 5 Microplate Laser with Enhanced Stability and Tunable Properties
Author(s) -
Tang Xiaosheng,
Hu Zhiping,
Yuan Wei,
Hu Wei,
Shao Haibing,
Han Dongjia,
Zheng Junfeng,
Hao Jiongyue,
Zang Zhigang,
Du Juan,
Leng Yuxin,
Fang Liang,
Zhou Miao
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600788
Subject(s) - materials science , perovskite (structure) , crystallinity , nanomaterials , density functional theory , optoelectronics , band gap , valence (chemistry) , diode , laser , chemical stability , chemical physics , nanotechnology , chemical engineering , optics , computational chemistry , chemistry , physics , organic chemistry , composite material , engineering
Recent years have witnessed a surge of research in all‐inorganic perovskite nanomaterials for solar cells and light emitting diodes due to their higher chemical stability compared to their hybrid organic–inorganic counterparts. Herein, by combining material synthesis, characterization, optical measurement, and density functional theory based first principles calculation, a type of all‐inorganic perovskite CsPb 2 Br 5 microplate with superior crystallinity, enhanced stability, and tunable optical properties is reported. With a robust band gap of ≈2.44 eV, CsPb 2 Br 5 microplate exhibits low‐threshold amplified spontaneous emission under both one‐ and two‐photon excitation, which is related to its unique spatially distinguished valence/conduction band edge states originating from the intrinsic sandwiched structure. These results are expected to shed new light on future design and development of novel perovskite nanomaterials for optoelectronic devices.