Photoconductive Properties of Amorphous As-Se System

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概要

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• The photoconductivity spectra of amorphous As_xSe_<1-x> (0.3≤x≤0.5) with chopping frequencies of the illumination at 400 Hz, 16.7 Hz, and 1/60 Hz were measured and significant changes in the shape of the photoconductivity spectra was observed. The photocurrent is composed of slow and fast decay components and the ratio of the slow decay component to the total photocurrent for various compositions of As-Se exhibits drastic increases when the photon energy is decreased passing through the optical gap. Dependence of the photocurrent on the incident light intensity at various wavelengths shows that the transient chopping frequency from bimolecular to monomolecular recombination characteristic regions changes by about two orders of magnitude (10 Hz〜0.2 Hz) depending on the illumination wavelength. These effects are interpreted by means of the kinetic process of the photo-excited carriers and their recombination under the assumption of the presence of gap states.

• 社団法人応用物理学会の論文
• 1980-06-05

著者

• Yamamoto Kazuhiko

  Institute of Health Science, Kyushu University

• Arai Toshihiro

  Institute Of Applied Physics The University Of Tsukuba

• Arai Toshihiro

  Institute For Optical Research Kyoiku University

• Onari Seinosuke

  Institute For Optical Research Tokyo University Of Education

• Kitahara Tadashi

  Institute Of Applied Physics University Of Tsukuba

• Yamamoto Kazuhiko

  Institute Of Applied Physics The University Of Tsukuba

• Arai Toshihiro

  Institte For Optical Research Kyoiku University

• Kitahara Tadashi

  Institute Of Applied Physics The University Of Tsukuba

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