CuInS2 nanoparticles were prepared by solvothermal method using inorganic salts as metal sources(InCl3,CuCl and CS2).Further,biodegradable organic precursors of copper,indium and sulfur metal were used as film crosslinking agents,which coated copper indium sulfur nanoparticles with crosslinking agents to obtain precursor ink,and then CuInS2 film was prepared by spin coating.Finally,CuInSxSe2-x(CISS)light-absorbing layer was obtained by selenizing CuInS2 film.The structure and properties of CISS films were investigated by X-ray diffractometer(XRD),scanning electron microscope(SEM),thermogravimetric(TG)and Hall-effect testing.The results showed that the size of the selenized film was enlarged and the structure was still chalcopyrite.Hall-effect analysis showed that the prepared CISS film was suitable for the absorption layer of thin film solar cells.
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