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Synergistically Enhanced Amplified Spontaneous Emission by Cd Doping and Cl‐Assisted Crystallization
Author(s) -
Zhang Lu,
Wen Jialun,
Ren Xiaodong,
Jin Shengye,
Liu Shengzhong
Publication year - 2021
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.202001825
Subject(s) - materials science , crystallite , amplified spontaneous emission , population inversion , photoluminescence , doping , perovskite (structure) , crystallization , optoelectronics , active laser medium , halide , stimulated emission , ion , spontaneous emission , laser , chemical engineering , optics , inorganic chemistry , laser power scaling , chemistry , organic chemistry , physics , metallurgy , engineering
Organic−inorganic hybrid halide perovskite materials have recently been recognized as a promising optical gain medium, and the development of optically pumped amplified spontaneous emission (ASE) of perovskite materials with low threshold and high optical gain will be on the only way to go for realizing its commercial perovskite laser. In this work, enhanced‐performance ASE with lower threshold and higher optical gain is obtained in CdCl 2 passivated FA 0.9 MA 0.15 Cs 0.3 PbI 2.7 Br 0.3 (FAMACs) polycrystalline films coated with poly methyl methacrylate (PMMA) layer. The ASE threshold of the FAMACs polycrystalline films with CdCl 2 is significantly reduced from 18.7 to 7.9 µ J cm −2 , with an enhanced ASE output intensity and stability. The improved ASE performance can be attributed to the synergistic effect of Cd ion doping and Cl‐ion‐assisted crystallization in the FAMACs polycrystalline films, exhibiting remarkably enhanced photoluminescence, a prolonged decay lifetime and a low defect density, and thus leading to easily achieve the population inversion due to the reduction of nonradiative recombination of carriers in the optical gain medium.