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Title: Effect of substrate temperature on photoconductivity in CdS thin films
Authors: Singh, K Kunjabali
Kar, Manoranjan
Das, H L
Keywords: CdS thin films
Substrate temperature
Grain size
Activation energy
Issue Date: Feb-2010
Publisher: CSIR
Abstract: Photo-electronic properties of CdS thin films (0.25μm thick) grown by thermal evaporation (TE) method on cleaned glass substrates held at different substrate temperatures <i style="">(T</i>s<i style="">)</i> in the range 300-473K have been studied under different intensities of white light, bias voltages and ambient temperatures. The grain sizes are found to increase with <i style="">T</i>s which enhanced the photosensitivity of the films. The photosensitivity of the films has been found to increase with light intensity, <i style="">T</i>s<i style=""> </i>and bias voltage. The evaluation of dark and photo-activation energies and mobility activation energies show double photo-activation processes. The activation energies and the mobility activation energies are observed to be decreasing with increasing <i style="">T</i>s and ambient temperature, and reveal the presence of various discrete trap distributions at different trap depths.
Description: 110-114
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.48(02) [February 2010]

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