Optics and Spectroscopy
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Features of photoconductivity and luminescence of CdS thin films and Cd1-xZnxS solid solutions under laser excitation
Salmanov V. M.1, Guseinov A. G.1, Jafarov M. A.1, Mamedov R. M.1, Mamedova T. A.1
1Baku State University, Baku, Azerbaijan
Email: vagif_salmanov@yahoo.com
The features of photoconductivity and luminescence of CdS thin films and Cd1-xZnxS solid solutions obtained by chemical pulverization with subsequent pyrolysis under laser excitation have been studied experimentally. Pulsed liquid (473-547 nm) and nitrogen (337 nm) lasers were used as a radiation source. An experimental study was made of the photoconductivity and photoluminescence spectra of Cd1-xZnxS thin films depending on the composition x at different excitation intensities and the relaxation curves of nonequilibrium photoconductivity. It is shown that the observed features in the photoconductivity and photoluminescence spectra of Cd1-xZnxS thin films are due to direct band-to-band transitions. Amplification of light is observed at high intensities of optical excitation in thin CdS films. Keywords: Thin films CdS, Cd1-xZnxS, laser, photoconductivity spectra, photoluminescence
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