標題: Enhanced photoresponse of a metal-oxide-semiconductor photodetector with silicon nanocrystals embedded in the oxide layer
作者: Shieh, Jia-Min
Lai, Yi-Fan
Ni, Wei-Xin
Kuo, Hao-Chung
Fang, Chih-Yao
Huang, Jung Y.
Pan, Ci-Ling
光電工程學系
Department of Photonics
公開日期: 29-Jan-2007
摘要: The authors report a two-terminal metal-oxide-semiconductor photodetector for which light is absorbed in a capping layer of silicon nanocrystals embedded in a mesoporous silica matrix on p-type silicon substrates. Operated at reverse bias, enhanced photoresponse from 300 to 700 nm was observed. The highest optoelectronic conversion efficiency is as high as 200%. The enhancements were explained by a transistorlike mechanism, in which the inversion layer acts as the emitter and trapped positive charges in the mesoporous dielectric layer assist carrier injection from the inversion layer to the contact, such that the primary photocurrent could be amplified. (c) 2007 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.2450653
http://hdl.handle.net/11536/11216
ISSN: 0003-6951
DOI: 10.1063/1.2450653
期刊: APPLIED PHYSICS LETTERS
Volume: 90
Issue: 5
結束頁: 
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