Localized exciton dynamics in AlInGaN alloy

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	Localized exciton dynamics in AlInGaN alloy
	Huang JS ; Dong X ; Luo XD ; Liu XL ; Xu ZY ; Ge WK
刊名	solid state communications
	2003
卷号	126 期号:8 页码:473-477
关键词	AlInGaN quantum dots hopping stretched-exponential decay MULTIPLE-QUANTUM WELLS LIGHT-EMITTING-DIODES TIME-RESOLVED PHOTOLUMINESCENCE CHEMICAL-VAPOR-DEPOSITION THERMAL-ACTIVATION LUMINESCENCE TRANSITIONS RELAXATION SILICON LAYERS
ISSN号	0038-1098
通讯作者	huang js,pob 912 nlsm,beijing 100083,peoples r china.
中文摘要	carrier recombination dynamics in alingan alloy has been studied by photoluminescence (pl) and time-resolved pl (trpl) at various temperatures. the fast red-shift of pl peak energy is observed and well fitted by a physical model considering the thermal activation and transfer processes. this result provides evidence for the exciton localization in the quantum dot (qd)-like potentials in our alingan alloy. the trpl signals are found to be described by a stretched exponential function of exp[(-t/,tau)13], indicating the presence of a significant disorder in the material. the disorder is attributed to a randomly distributed qds or clusters caused by indium fluctuations. by studying the dependence of the dispersive exponent beta on temperature and emission energy, we suggest that the exciton hopping dominate the diffusion of carriers localized in the disordered qds. furthermore, the localized states are found to have 0d density of states up to 250 k, since the radiative lifetime remains almost unchanged with increasing temperature. (c) 2003 elsevier science ltd. all rights reserved.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-08-12
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/11562]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Huang JS,Dong X,Luo XD,et al. Localized exciton dynamics in AlInGaN alloy[J]. solid state communications,2003,126(8):473-477.
APA	Huang JS,Dong X,Luo XD,Liu XL,Xu ZY,&Ge WK.(2003).Localized exciton dynamics in AlInGaN alloy.solid state communications,126(8),473-477.
MLA	Huang JS,et al."Localized exciton dynamics in AlInGaN alloy".solid state communications 126.8(2003):473-477.