Chemical Bath Deposition of Low-Cost Cadmium Sulfide Thin Films for Optoelectronic Devices
Author : Shivali Chauhan
Abstract :
Cadmium sulfide thin films are highly valued for their versatile optical and electrical properties, making them essential in various technological applications. Composed of cadmium and sulphur, these films are typically deposited onto substrates using methods such as chemical vapor deposition, sputtering, or chemical bath deposition. This study focuses on the deposition of transparent Cadmium sulfide thin films on glass microslides using the low-cost Chemical Bath Deposition technique. Prior to deposition, thorough cleaning of the glass surfaces was conducted to avoid contamination. The deposition solution, consisting of a Cadmium Chloride and thiourea mixture in distilled water, utilized acetonitrile as a complexing agent. The pH was adjusted using ammonia solution. The deposition temperature ranged from 60° to 70°, with continuous stirring. This approach demonstrates an effective method for producing CdS thin films suitable for applications in optoelectronics and other technological fields. Bandgap of the films was also calculated with the help of Transmission Spectra. Surface Morphology studies were also carried out.
Keywords :
Chemical bath deposition, CdS, thin films, thiourea, CH3CN
