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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.48 [2010] >
IJPAP Vol.48(02) [February 2010] >
| 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
Photoconductivity
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 (Ts) 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 Ts which enhanced the photosensitivity of the films. The photosensitivity of the films has been found to increase with light intensity, Ts 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 Ts and ambient temperature, and reveal the presence of various discrete trap distributions at different trap depths. |
| Page(s): | 110-114 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.48(02) [February 2010]
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