文章基本信息

标题：Effect of Different Chemical Environment on Porous Silicon
本地全文：下载
作者：Amita Gupta ; Alok Jain ; V. K. Jain 等
期刊名称：Defence Science Journal
印刷版ISSN：0976-464X
出版年度：2013
卷号：50
期号：1
页码：87-94
DOI：10.14429/dsj.50.3354
语种：English
出版社：Defence Scientific Information & Documentation Centre
摘要：Properties of porous silicon (PS) are found to be sensitive towards different chemical environment. Because of its large surface area, it is highly reactive and can adsorb chemical vapours. The present study shows that photoconductivity and photoluminescence (PL) properties are changed significantly in the presence ofacetone, ammonia and steam vapours and can be used to identify and sense these chemical environment. These results also suggest that the molecules adsorbed on the pores change the transport mechanism of carriers in PS, leading to increase or decrease in conductivity. On the other hand, surface states on the enormous PS surface are modified under different chemical environment, leading to change in visible PL.
关键词：Porous silicon;Chemical vapours