Photoluminescence mechanism for blue-light-emitting porous silicon

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	Photoluminescence mechanism for blue-light-emitting porous silicon
	G. G. Qin; X. S. Liu; S. Y. Ma; J. Lin; G. Q. Yao; X. Y. Lin; K. X. Lin
	1997
发表期刊	Physical Review B
ISSN	1098-0121
卷号	55 期号:19 页码:12876-12879
摘要	A comparative study of photoluminescence (PL) and photoluminescence excitation (PLE) spectra of porous silicon (PS) and Si oxide, both enlitting blue light, is reported. The PLE spectrum of Si oxide monitored at 160 nm displays a three-peak structure with peak wavelengths around 265, 300, and 360 nm. The PLE intensity of the PS sample increases with decreasing excitation wavelength, and has three shoulders located at wavelengths near the three PLE peak wavelengths of Si oxide. When the PS sample is oxidized for half an hour at 1150C [the temperature at which nanometer Si particles (NSP's) inside PS disappear], blue-light PL intensity reduces greatly, and its PLE spectrum changes into a spectrum very similar to that of Si oxide. The experimental result strongly indicates that for the blue-light emission from PS there are two types of photosxcitation processes: photoexcitation occurs in NSP's and in the Si oxide layers covering NSP's, and radiative recombinntion of electron-hole pairs is carried out in luminescence centers located on the interfaces between NSP's and Si oxide and in those inside Si oxide layers.
部门归属	acad sinica,int ctr mat phys,shenyang 110015,peoples r china. beijing univ,dept chem,beijing 100871,peoples r china. shantou univ,dept phys,shantou 515063,peoples r china.;qin, gg (reprint author), beijing univ,dept phys,beijing 100871,peoples r china
关键词	Visible Luminescence Optical-properties Emission Si Excitation Origin
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38066
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. G. Qin,X. S. Liu,S. Y. Ma,et al. Photoluminescence mechanism for blue-light-emitting porous silicon[J]. Physical Review B,1997,55(19):12876-12879.
APA	G. G. Qin.,X. S. Liu.,S. Y. Ma.,J. Lin.,G. Q. Yao.,...&K. X. Lin.(1997).Photoluminescence mechanism for blue-light-emitting porous silicon.Physical Review B,55(19),12876-12879.
MLA	G. G. Qin,et al."Photoluminescence mechanism for blue-light-emitting porous silicon".Physical Review B 55.19(1997):12876-12879.