Preparation of polycrystalline thin films of CuInSe2 by electrodeposition
Abstract
CuInSe2 thin films with the chalcopyrite structure were electrodeposited on titanium substrates from an acidic sulphate solution containing citrate ions as a complexing agent. These layers were characterized by X-ray diffraction, SEM, X-ray energy dispersive analysis and spectrophotometry of reflected light. The best deposits were obtained atE=−0.97V vs SSE, in a solution adjusted to pH 3.3. The deposition of the binary alloys was also investigated. It was shown that the formation of smooth layers of crystalline definite compounds is correlated with a slow surface process which induces a plateau on the polarization curves.