EFFECT OF ANNEALING TIME AND TEMPERATURE ON STRUCTURAL, OPTICAL AND ELECTRICAL PROPERTIES OF CdS FILMS DEPOSITED BY CBD
نویسنده
چکیده
Cadmium sulphide (CdS) thin films were deposited onto glass substrates by chemical bath deposition (CBD) from a bath containing cadmium acetate, ammonium acetate, thiourea and ammonium hydroxide. The CdS films were annealed in air at various temperatures (350, 400 and 450 °C) for 60 minutes, and times (5, 15, 30, 45 and 60 minutes) at constant temperature (400 °C) in order to investigate the influence of post-deposition annealing treatments on the structural, optical and electrical properties. The various structural parameters such as grain size, lattice constant and strain, were investigated using XRD. The as-deposited films have the mixed (cubic and hexagonal) phase. The grain size increases due to annealing and grain growth is a function of annealing temperature and time duration. The band gap of the films was calculated from the transmittance data. In general the results showed that the structural, optical and electrical properties of CdS depends on the post-deposition annealing duration and temperatures.
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