Photoconductive and ellipsometric studies of spray pyrolysed CdS thin films |
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| Authors: | A G Valyomana Sunny Mathew K P Vijayakumar C Purushothaman |
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| Affiliation: | (1) Department of Physics, Cochin University of Science and Technology, 682 022 Kochi, India |
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| Abstract: | The influence of annealing temperature on photoconductivity of spray pyrolysed CdS films has been investigated. The annealing
of films at 373K resulted in maximum photoconductivity. The photoconductivity at all wavelengths was found to decrease with
increase of annealing temperature and became a minimum at 473K. For films annealed at or above 523K, the photoconductivity
for wavelengths ⩾560 nm decreased considerably. The results are discussed with the help of ellipsometric data, visible and
IR spectra of these samples. Also the variation in photoconductivity of these samples were studied during heating to analyse
the effect of trapping. |
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| Keywords: | Spray pyrolysis CdS photoconductivity ellipsometry |
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