(南大學(xué) 能源科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 以三乙烯四胺和乙二醇(1:1，體積比)為混合溶劑，在常壓下于200 ℃反應(yīng)2 h，由液相回流法合成了CuInS2微米顆粒。用XRD、SEM、EDS和 UV-Vis spectra技術(shù)分別表征產(chǎn)物的物相、形貌、組分以及光學(xué)特性。結(jié)果表明：所合成的產(chǎn)物為純相黃銅礦結(jié)構(gòu)CuInS2微米顆粒，結(jié)晶度良好，滿足化學(xué)計量比，光學(xué)禁帶寬度為1.43 eV。反應(yīng)溫度對產(chǎn)物的物相影響較大，而對形貌的影響較小；反應(yīng)溫度為200 ℃時，CuInS2的性能最佳。反應(yīng)時間對產(chǎn)物的物相和形貌的影響不大，反應(yīng)時間達(dá)2 h，反應(yīng)基本完成。
關(guān)鍵字: CuInS2；太陽能電池材料；液相回流法；光學(xué)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
