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Temperature dependence of the optical gap in thin amorphous films of , and other basic non-crystalline chalcogenides
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| Abstract |
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| Optical transmittivity in the UV-VIS region of thermally evaporated amorphous As2S3, and As2Se3 thin films was measured in the temperature region 15 K < T less than or equal to 300 K. The temperature dependence of the optical gap (E-g(T)) was found to be in agreement with Fan's one-phonon approximation or with Cody's one-oscillator model. The parameters necessary to describe the E-g(T) dependences for non-crystalline Se, As2S3, As2Se3, GeS2 and GeSe2, according to a simple linear relation, Varshni's relation, and Fan's or Cody's model are summarized. (C) 2000 Elsevier Science Ltd. All rights reserved. | | |
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English
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The journal of physics and chemistry of solids. - New York, N.Y. | |
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New York, N.Y. : 2000
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0022-3697
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61:4(2000), p. 545-550
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000085842100008
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