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

Yang Liu; Ju Wang; Lin Zhang; Wei Liu; Cuncun Wu; Congyue Liu; Zhaoxin Wu; Lixin Xiao; Zhijian Chen; Shufeng Wang

doi:10.1364/OE.27.029124

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

Yang Liu
, Ju Wang
, Lin Zhang
, Wei Liu
, Cuncun Wu
, Congyue Liu
, Zhaoxin Wu
, Lixin Xiao
, Zhijian Chen
, Shufeng Wang

Faculty of Electronic and Information Engineering

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

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 μ = 0.11 m_e. This discovery identifies more details of the ASE phenomenon.

Original language	English
Pages (from-to)	29124-29132
Number of pages	9
Journal	Optics Express
Volume	27
Issue number	20
DOIs	https://doi.org/10.1364/OE.27.029124
State	Published - 30 Sep 2019

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title = "Exciton and bi-exciton mechanisms in amplified spontaneous emission from CsPbBr3 perovskite thin films",

abstract = "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 (EB = 27.3 meV) and that of the bi-exciton, which is lower than the EB. The reduced effective mass of the exciton is estimated as μ = 0.11 me. This discovery identifies more details of the ASE phenomenon.",

author = "Yang Liu and Ju Wang and Lin Zhang and Wei Liu and Cuncun Wu and Congyue Liu and Zhaoxin Wu and Lixin Xiao and Zhijian Chen and Shufeng Wang",

note = "Publisher Copyright: {\textcopyright} 2019 Optical Society of America.",

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T1 - Exciton and bi-exciton mechanisms in amplified spontaneous emission from CsPbBr3 perovskite thin films

AU - Liu, Yang

AU - Wang, Ju

AU - Zhang, Lin

AU - Liu, Wei

AU - Wu, Cuncun

AU - Liu, Congyue

AU - Wu, Zhaoxin

AU - Xiao, Lixin

AU - Chen, Zhijian

AU - Wang, Shufeng

PY - 2019/9/30

Y1 - 2019/9/30

N2 - 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 (EB = 27.3 meV) and that of the bi-exciton, which is lower than the EB. The reduced effective mass of the exciton is estimated as μ = 0.11 me. This discovery identifies more details of the ASE phenomenon.

AB - 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 (EB = 27.3 meV) and that of the bi-exciton, which is lower than the EB. The reduced effective mass of the exciton is estimated as μ = 0.11 me. This discovery identifies more details of the ASE phenomenon.

UR - https://www.scopus.com/pages/publications/85072737810

U2 - 10.1364/OE.27.029124

DO - 10.1364/OE.27.029124

M3 - 文章

C2 - 31684651

AN - SCOPUS:85072737810

SN - 1094-4087

VL - 27

SP - 29124

EP - 29132

JO - Optics Express

JF - Optics Express

IS - 20

ER -

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

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