OPTICAL-PROPERTIES OF INS LAYERS DEPOSITED USING AN AIRLESS SPRAY TECHNIQUE

InS films with compositions close to that of the In2S3 compound were p repared by an airless spray technique from spray solutions with compos ition ratio y=[In3+]/[S2-] varying from 0.43 to 0.6. The structure of these films was characterized by electron diffraction and electron mic roscopy, and their optical properties were studied on the one hand by spectrophotometric measurements, on the other hand by spectroscopic el lipsometry. The influence of the increase of the y ratio on the optica l properties as well as of annealing treatments up to 500 degrees C is described and discussed in terms of crystallinity improvement.