Origin and evolution of photoluminescence from Si nanocrystals embedded in a SiO2 matrix

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	Origin and evolution of photoluminescence from Si nanocrystals embedded in a SiO2 matrix
	Wang XX ; Zhang JG ; Ding L ; Cheng BW ; Ge WK ; Yu JZ ; Wang QM
刊名	physical review b
	2005
卷号	72 期号:19 页码:art.no.195313
关键词	SILICON NANOCRYSTALS
ISSN号	1098-0121
通讯作者	wang, xx, chinese acad sci, inst semicond, state key lab integrated optoelect, beijing 100083, peoples r china. 电子邮箱地址: wangxiaoxin@red.semi.ac.cn
中文摘要	a detailed analysis of the photoluminescence (pl) from si nanocrystals (ncs) embedded in a silicon-rich sio2 matrix is reported. the pl spectra consist of three gaussian bands (peaks a,b, and c), originated from the quantum confinement effect of si ncs, the interface state effect between a si nc and a sio2 matrix, and the localized state transitions of amorphous si clusters, respectively. the size and the surface chemistry of si ncs are two major factors affecting the transition of the dominant pl origin from the quantum confinement effect to the interface state recombination. the larger the size of si ncs and the higher the interface state density (in particular, si = o bonds), the more beneficial for the interface state recombination process to surpass the quantum confinement process, in good agreement with qin's prediction in qin and li [phys. rev. b 68, 85309 (2003)]. the realistic model of si ncs embedded in a sio2 matrix provides a firm theoretical support to explain the transition trend.
学科主题	光电子学
收录类别	SCI
语种	英语
公开日期	2010-03-17
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/8384]
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	Wang XX,Zhang JG,Ding L,et al. Origin and evolution of photoluminescence from Si nanocrystals embedded in a SiO2 matrix[J]. physical review b,2005,72(19):art.no.195313.
APA	Wang XX.,Zhang JG.,Ding L.,Cheng BW.,Ge WK.,...&Wang QM.(2005).Origin and evolution of photoluminescence from Si nanocrystals embedded in a SiO2 matrix.physical review b,72(19),art.no.195313.
MLA	Wang XX,et al."Origin and evolution of photoluminescence from Si nanocrystals embedded in a SiO2 matrix".physical review b 72.19(2005):art.no.195313.