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.

摘要

黄铜矿CuInS ₂薄膜由硝酸盐在220℃以下制备。以无水乙醇为溶剂时，反应周期、温度和保温时间是影响结晶的主要因素。增加反应周期、温度和保温时间有利于结晶度。以硫代乙酰胺和硫脲为硫源制备的CuInS ₂薄膜具有黄铜矿结构，硫脲制备的CuInS ₂薄膜的结晶度略好于硫代乙酰胺。它由直径为 0.1 ∼ 0.4 μm 的球形颗粒组成。黄铜矿CuInS ₂薄膜样品的能带估计间隙约为1.49～1.51 eV。