[en] The objective of this work has been to investigate the electrodeposition as a low-cost, large-area fabrication process to obtain CuInSe₂ this films for efficient photovoltaic devices. this objective entails the elucidation of thin film deposition mechanism, the study of the fundamental properties of electrodeposited material, and also the modification of their physical and chemical parameters for photovoltaic applications. CuInSe₂ thin films have been successfully electrodeposited from a citric was characterized by compositional, structural, electrical, optical and electrochemical measurements, relating their properties with the preparation parameters and also studying the effect of various thermal and chemical treatments. The results showed post-deposition treatment are needed for optimizing these films for solar cells fabrication: first, an annealing in inert atmosphere at temperatures above 400 degrees celsius to obtain a high recrystallization in the chalcopyrite structure, and after a chemical etching in KCN solution to remove secondary phases of Cu_xSe and Se which are frequently electrodeposited with the CuInSe₂. The treated samples showed appropriate photovoltaic activity in a semiconductor-electrolite liquid junction. (author) 193 ref