Sa. Mahmoud et al., Physical properties of thermal coating CdS thin films using a modified evaporation source, THIN SOL FI, 372(1-2), 2000, pp. 144-148
Thin films of CdS on glass substrates have been prepared by a thermal evapo
ration technique using a modified evaporation source under different prepar
ation conditions. The structural features have been investigated using XRD.
The current density-voltage characteristics have been investigated at room
temperature with different thicknesses. The results showed ohmic conductio
n in the lower voltage range and space-charge limited conduction controlled
by a single-discrete trapping level for a higher voltage section. Analyses
of the results yielded important dependence of film thickness on both the
thermally-generated electron concentration and the trapping factor. The opt
ical parameters have been calculated. The dependence of the refractive inde
x, n, and extinction coefficient, k, on the wavelength for a prepared sampl
e is also reported. (C) 2000 Elsevier Science S.A. All rights reserved.