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Photoacoustic determination of the energy band characterics for porous silicon carbides

Lee Ki-Huan Li Yi-De Du Ying-Lei Wu Bai-Mei

Photoacoustic determination of the energy band characterics for porous silicon carbides

Lee Ki-Huan, Li Yi-De, Du Ying-Lei, Wu Bai-Mei
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  • Abstract views:  3221
  • PDF Downloads:  801
  • Cited By: 0
Publishing process
  • Received Date:  30 July 2002
  • Accepted Date:  09 September 2002
  • Published Online:  20 May 2003

Photoacoustic determination of the energy band characterics for porous silicon carbides

  • 1. (1)国立公州大学化学系,韩国,公州; (2)中国科学技术大学天文与应用物理系,合肥 230026; (3)中国科学技术大学物理系,合肥 230026

Abstract: The photoacoustic spectra from ptype αporous silicon carbides prepared under UV photoassisted process and under darkcurrent condition have been measured,the original silicon carbides were also measured. Combined with RosencwaigGersho theory, the photoaconstic spectra are turned into the absorption spectra. It is found that the energy band gaps of the porous silicon carbide were lower than that of the original silicon carbide, and the causes were analyzed in detail. The absorptions near the absorption edge were studied as well.

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