Preparation of thin CuInSe2 films using Cu-In alloy nanoparticles

Thin CuInSe2 films were synthesized via selenizing Cu-In alloy-containing precursors. The alloy nanoparticles with Cu-In and Cu 2In were obtained via chemical reduction in ethylene glycol. Nanoparticles with a size around 40-60nm were formed. The thin monophasic chalcopyrite CuInSe2 film with large grains was formed at 450 ¢XC. Using the alloy nanoparticles for the coating process was demonstrated to be a potential way for preparing thin CuInSe2 films. ? 2010 The Chemical Society of Japan.