EVOLUTION OF PHOTOLUMINESCENCE IN LASER ILLUMINATING POROUS SILICON

CORC > 金属研究所 > 中国科学院金属研究所

	EVOLUTION OF PHOTOLUMINESCENCE IN LASER ILLUMINATING POROUS SILICON
	L. Z. Zhang ; H. Z. Song ; B. R. Zhang ; Z. H. Xu ; G. G. Qin
刊名	Materials Research Bulletin
	1994
卷号	29 期号:6 页码:603-609
关键词	porous silicon luminescent materials si photoluminescence visible luminescence mechanism
ISSN号	0025-5408
中文摘要	Exposed to strong laser in air, the photoluminescence (PL) peak position of porous silicon (PS) shifts first to blue side followed by a pinning at a constant wave-length, while PL intensity degrades rapidly first, then increases slowly. Fourier transform infrared absorption spectra show a continuous enhancement of vibrations related to oxygen and a continuous attenuation of vibrations related to hydrogen with exposure time. A new physical model on light emission of PS, which says that incident light excites electron-hole pairs in nanoscale silicon units (NSUs) and the electron-hole pairs diffuse outwards and recombine through the luminescence centers (LCs) outside NSUs, can explain the experimental results successfully. We think the main LCs are hydrides, such as polysilanes or Si-H bonds, in as-prepared PS samples but transfer tinder laser illumination to be point defects or impurities in SiO2 layers which cover the NSUs.
原文出处	://WOS:A1994NM72700003
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/38968]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Z. Zhang,H. Z. Song,B. R. Zhang,et al. EVOLUTION OF PHOTOLUMINESCENCE IN LASER ILLUMINATING POROUS SILICON[J]. Materials Research Bulletin,1994,29(6):603-609.
APA	L. Z. Zhang,H. Z. Song,B. R. Zhang,Z. H. Xu,&G. G. Qin.(1994).EVOLUTION OF PHOTOLUMINESCENCE IN LASER ILLUMINATING POROUS SILICON.Materials Research Bulletin,29(6),603-609.
MLA	L. Z. Zhang,et al."EVOLUTION OF PHOTOLUMINESCENCE IN LASER ILLUMINATING POROUS SILICON".Materials Research Bulletin 29.6(1994):603-609.