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A Two‐Dimensional Ruddlesden–Popper Perovskite Nanowire Laser Array based on Ultrafast Light‐Harvesting Quantum Wells
Author(s) -
Zhang Haihua,
Wu Yishi,
Liao Qing,
Zhang Zhaoyi,
Liu Yanping,
Gao Qinggang,
Liu Peng,
Li Meili,
Yao Jiannian,
Fu Hongbing
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201802515
Subject(s) - lasing threshold , nanowire , materials science , laser , optoelectronics , quantum well , perovskite (structure) , ultrashort pulse , optics , chemistry , crystallography , physics , wavelength
Miniaturized nanowire nanolasers of 3D perovskites feature a high gain coefficient; however, room‐temperature optical gain and nanowire lasers from 2D layered perovskites have not been reported to date. A biomimetic approach is presented to construct an artificial ligh‐harvesting system in mixed multiple quantum wells (QWs) of 2D‐RPPs of (BA) 2 (FA) n−1 Pb n Br 3n+1 , achieving room‐temperature ASE and nanowire (NW) lasing. Owing to the improvement of flexible and deformable characteristics provided by organic BA cation layers, high‐density large‐area NW laser arrays were fabricated with high photostability. Well‐controlled dimensions and uniform geometries enabled 2D‐RPPs NWs functioning as high‐quality Fabry–Perot (FP) lasers with almost identical optical modes, high quality (Q) factor (ca. 1800), and similarly low lasing thresholds.