Abstract
CdS thin films were deposited onto glass substrate by the chemical bath deposition method, using cadmium chloride (CdCl2) as a source of cadmium, thiourea (CS(NH2)2) as a source of sulphur, ammonium nitrate (NH4NO3) as buffer salt and ammonia as pH controller and complexing agent. The effects of the deposition temperature and the concentration of ammonium nitrate on the structural, compositional, optical and optoelectrical properties of CdS thin films were investigated. The optimised sample was utilised for fabrication of photodetectors. A high photosensitivity and a short response time was reported for the photodetectors based on the sample with the bath temperature of 65°C and concentration of ammonium nitrate of 1.5 M compare with the other samples.
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