@article { ISI:000488282800161,
	title = {Exciton and bi-exciton mechanisms in amplified spontaneous emission from CsPbBr3 perovskite thin films},
	journal = {OPTICS EXPRESS},
	volume = {27},
	number = {20},
	year = {2019},
	month = {SEP 30},
	pages = {29123-29131},
	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 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},
	issn = {1094-4087},
	doi = {10.1364/OE.27.029124},
	author = {Yang Liu and Wang, Ju and Lin Zhang and Wei Liu and Wu, Cuncun and Liu, Congyue and Wu, Zhaoxin and Xiao, Lixin and Chen, Zhijian and Wang, Shufeng}
}
