BATH PARAMETER DEPENDENCE OF CHEMICALLY-DEPOSITED COPPER SELENIDE THIN FILM
In this article, a low cost chemical bath deposition (CBD) technique has been used for the preparation of Cu 2-x Se thin films on to glass substrate. Different thin films (0.2–0.6 μm) were prepared by adjusting the bath parameter like concentration of ammonia, deposition time, temperature of the solution, and the ratios of the mixing composition between copper and selenium in the reaction bath. From these studies, it reveals that at low concentration of ammonia or TEA, the terminal thicknesses of the films are less, which gradually increases with the increase of concentrations and then drop down at still higher concentrations. It has been found that complexing the Cu 2+ ions with TEA first, and then addition of ammonia yields better results than the reverse process. The film thickness increases with the decrease of value x of Cu 2-x Se .