Process for the electrolytic deposition of gallium - and gallium alloy - thin films and associated photovoltaic structures

摘要

Photovoltaic units and method for creating a p - semiconductor layer for the photovoltaic units generally contain a electroplating a layer of gallium or a gallium alloy to a conductive layer by contacting the conductive layer with a galvanization bath, which is free of complexing agents and a gallium salt, methanesulfonic acid or sodium sulfate and an organic additive, the at least one nitrogen atom and / or at least one sulfur atom, and a solvent; and a setting a ph - value of the solution to below 2,6 or via 12,6. the photovoltaic unit includes an impurity in the p - semiconductor layer, which is selected from the group consisting of arsenic, antimony, bismuth and mixtures thereof. Various photovoltaic modules - precursor layers for forming of p - conductive cis -, cgs - and - cigs semiconductor structures, by means of electroplating of the gallium or of the gallium alloys are formed in this way. In addition, processes for forming a thermal intermediate layer of gallium or a gallium alloy, with the aid of the electroplating process.