Long-Term Photocurrent Decay in Amorphous As 2 Se 3 Doped with Ag and Cu

Long-term photocurrent decays have been investigated on glassy samples of As 2 Se 3 containing silver or copper up to 1.5 at.%. A pronounced decrease in photocurrent is observed with the addition of impurities up to 0.1 at.%. Photocurrent decay characteristics for all the samples examined are well r...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1992-02, Vol.31 (2R), p.181
Main Authors: Satoh, Kenji, Yamanashi, Yasushi, Michihiko Kitao, Michihiko Kitao, Shoji Yamada, Shoji Yamada
Format: Article
Language:English
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Summary:Long-term photocurrent decays have been investigated on glassy samples of As 2 Se 3 containing silver or copper up to 1.5 at.%. A pronounced decrease in photocurrent is observed with the addition of impurities up to 0.1 at.%. Photocurrent decay characteristics for all the samples examined are well represented by the extended exponential curve, which can be derived under the assumption of dispersive transport. Activation energy of transient photocurrent decreases with the addition of silver and copper. Recombination rate increases with impurity content in a low-concentration range. Recombination centers are considered to be created by the addition of impurities. In the case of copper, the recombination rate tends to decrease in the concentration range above 0.1 at.%.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.31.181