Title: Temperature-dependent decay dynamics in highly mismatched ZnSe1-xTex alloy
Authors: Lin, Yan-Cheng
Jiang, Wei-Shi
Chou, Wu-Ching
Chen, Wei-Kuo
Chang, Wen-Hao
Chia, Chin-Hau
Chen, Cheng-Yu
Chyi, Jen-Inn
Department of Electrophysics
Issue Date: 13-Feb-2012
Abstract: This study investigates the temperature-dependent decay dynamics in highly mismatched ZnSe0.950Te0.050 alloy using photoluminescence (PL) and time-resolved PL spectroscopy. The PL peak energy exhibits a V-shaped dependence on temperature (10-300 K), indicating strong carrier localization. Kohlrausch's stretched exponential law, in which the deduced stretching exponent beta is highly consistent with the V-shaped PL peak shift, closely corresponds to the complex decay curves over a wide temperature range. Additionally, the PL lifetime tau initially increases and then monotonically declines as the temperature increases. These findings agree excellently with the low electron-hole binding energy upon thermal ionization of weakly bound electrons. (C) 2012 American Institute of Physics. [doi:10.1063/1.3687187]
URI: http://dx.doi.org/10.1063/1.3687187
ISSN: 0003-6951
DOI: 10.1063/1.3687187
Volume: 100
Issue: 7
End Page: 
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