Abstract
The Chalcopyrite CuInS2 films were prepared from nitrates below 220 °C. When the anhydrous ethanol is used as the solvent, the reaction cycle, temperature and holding time are main factors affecting crystallization. Increasing the reaction cycle, temperature and holding time are beneficial to the crystallinity. CuInS2 films prepared with thioacetamide and thiourea as sulfur sources have the chalcopyrite structure, the crystallinity of CuInS2 film prepared by thiourea is slightly better than that of by thioacetamide. It consists of spherical particles with diameters of 0.1 ∼ 0.4 μm. The band estimated gap of chalcopyrite CuInS2 film samples is about 1.49 ∼ 1.51 eV.
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