ONE-STEP ELECTROCHEMICAL DEPOSITION OF CU-IN-GA MIXED OXIDE THIN FILMS FOR LOWCOST CIGS SOLAR CELLS

摘要

One step electrodeposition of mixed copper indium gallium oxides and hydroxides film has beencarried out by cathodic deposition from dissolved metallic salts in nitrate electrolyte. The deposition conditions allowto control the composition of the film and the proportion of metallic elements in the optimal range for CIGS. Theprecursor films are then reduced into mixed metallic film by thermal annealing in an hydrogen containing atmosphereand then transformed in CIGS by selenization with elemental selenium. Cell efficiency of 9.4% has been obtainedwith this process.