Exciton and bi-exciton mechanisms in amplified spontaneous emission from CsPbBr3 perovskite thin films

被引：16
|
作者：
Liu, Yang [1 ]
Wang, Ju [1 ]
Zhang, Lin [2 ]
Liu, Wei [1 ]
Wu, Cuncun [1 ]
Liu, Congyue [1 ]
Wu, Zhaoxin [2 ]
Xiao, Lixin [1 ]
Chen, Zhijian [1 ]
Wang, Shufeng [1 ,3 ,4 ,5 ]
机构：
[1] Peking Univ, Dept Phys, State Key Lab Artificial Microstruct & Mesosco Ph, Beijing 100871, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Dept Elect Sci & Technol, Key Lab Photon Technol Informat, Xian 710049, Shaanxi, Peoples R China
[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
[4] Minist Educ NFC MOE, Nanooptoelect Frontier Ctr, Beijing 100871, Peoples R China
[5] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
来源：
OPTICS EXPRESS | 2019年 / 27卷 / 20期
基金：
中国国家自然科学基金;
关键词：
LEAD HALIDE PEROVSKITES; SINGLE-CRYSTAL; BINDING-ENERGY;
D O I：
10.1364/OE.27.029124
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We studied temperature-dependent amplified spontaneous emission (ASE) in CsPbBr3 perovskite thin films. For temperatures 180-360 K, a narrow-band lasing is observed. However, a new accompanying ASE band appears below 180 K, indicating a more complicated behavior. The two ASE bands are strongly correlated and in competition; they are assigned as exciton and bi-exciton recombination. We estimated the exciton binding energy (E-B = 27.3 meV) and that of the bi-exciton, which is lower than the E-B. The reduced effective mass of the exciton is estimated as mu = 0.11 m(c). This discovery identifies more details of the ASE phenomenon. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：29123 / 29131
页数：9
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