(南大学 能源科学与工程学院，长沙 410083)
摘 要: 以三乙烯四胺和乙二醇(1:1，体积比)为混合溶剂，在常压下于200 ℃反应2 h，由液相回流法合成了CuInS2微米颗粒。用XRD、SEM、EDS和 UV-Vis spectra技术分别表征产物的物相、形貌、组分以及光学特性。结果表明：所合成的产物为纯相黄铜矿结构CuInS2微米颗粒，结晶度良好，满足化学计量比，光学禁带宽度为1.43 eV。反应温度对产物的物相影响较大，而对形貌的影响较小；反应温度为200 ℃时，CuInS2的性能最佳。反应时间对产物的物相和形貌的影响不大，反应时间达2 h，反应基本完成。
关键字: CuInS2；太阳能电池材料；液相回流法；光学特性
（chool of Energy Science and Engineering, Central South University, Changsha 410083, China）
Abstract:With a mixed solvent of triethylenetetramine-ethylene glycol (1:1, v/v), CuInS2 micro-particles were synthesized by an aqueous synthesis method at 200 ℃ for 2h under the open-air condition. The phase constituents, morphology, structure and optical properties of the as-prepared CuInS2 powders were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and ultraviolet-visible (UV-vis) spectrophotometry. The results show that the synthesized products are chalcopyrite CuInS2 micro-particles, which have single phase, high crystallinity and stoichiometric composition, and their optical energy band gaps is 1.43 eV. The react temperature has a great influence on phase and a little influence on morphology under the experimental condition. CuInS2 has the best property when the react temperature is chosen as 200 ℃. The react time has a little influence both on phase and morphology, the reaction is basically completed when the react time is up to 2 h.
Key words: CuInS2; solar energy materials; aqueous synthesis method; optical property
