Sintered $Cd_{1-x}Zn_xS$ films have been prepared by screen printing technique from a mixture of CdS and ZnS powder in suitable proportions.
The composition of sintered $Cd_{1-x}Zn_xS$ films was compared with the amount of ZnS added ranging from 0 to 20 mole% ZnS concentration.
The dependence of X-ray diffraction pattern, lattice parameter, optical transmittance, electrical resistivity and energy gap on the amount of ZnS added was investigated.
Analysis of the X-ray diffraction pattern showed that films had hexagonal structure and formed solid solution. Lattice parameter decreased linearly with increasing amount of ZnS added.
Optical transmittance decreased and edge shifted with increasing amount of ZnS added.
Hall measurements were used to determine the carrier density and the mobility. It was observed that, although the mobility was relatively insensitive to the amount of ZnS added, the decrease in carrier density was quite significant.
The temperature dependence of electrical resistivity was used to explain qualitatively the conduction mechanism of the polycrystalline films.
The rise in electrical resistivity with increasing amount of ZnS added was due to decrease in carrier density. This decrease was explained by the chlorine donor level shifting rapidly down below the conduction band.
Photoconductivity measurements yielded a linear dependence of energy gap on the amount of ZnS added.
