Characterization of Cadmium Sulfide Films Deposited By Chemical Bath Method

摘要

Thin film cadmium sulfide is a leading candidate in the fabrication of large area solar cells. The chemical bath deposition method is one of the least expensive sources for the fabrication of device quality cadmium sulfide thin films. In the present work, the deposition of CdS films on glass substrate from an aqueous solution containing cadmium acetate, ammonia, ammonium acetate, and thiourea are investigated. The structural properties of CdS films are characterized. Good quality thin films within 0.1 ～ 0.5 μm thickness were obtained in 30 minute deposition time, and at 70°～ 90℃. The films show preferential orientations. The optical transmhtance of the films are in the range of 40～65% for wavelengths above the band gap absorption, making the films suitable as a window material in hetero-junction solar cells.