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

页码：29123 / 29131

页数：9

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