CHEMICAL-REACTION ANALYSIS OF COPPER INDIUM SELENIZATION

A chemical reaction analysis of the selenization of copper indium laye rs to form copper indium diselenide is presented Time-progressive sele nization reactions were carried out in a laminar flow tabular reactor in a dilate H2Se atmosphere at 400 degrees C. Copper, indium and coppe r-indium thin films were reacted for 1-60 min. The reacted films are a nalyzed by x-ray diffraction and atomic absorption spectrophotometry t o identify the chemical speciespresent in the reacted films. A reactio n network for film formation is proposed and data from time-progressiv e selenizations were analyzed to obtain species composition profiles, Rate expressions are postulated and a mathematical model for the selen ization is developed. The behavior of the model is compared with the e xperimentally determined species compositions to obtain specific react ion rate constants.