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Copper indium disulfide(CuInS2) nano-particles were synthesized by solvothermal method at 150 ℃ using copper(?) chloride,indium(Ш) chloride,thiourea and ethanol as raw materials,and characterized by X-ray diffraction(XRD),field-emission scanning electron microscope(FESEM),and UV-Vis spectra.The effects of pH value on its micro-structures and optical properties were investigated.The results show that,with the pH value increasing,the particle size of the nano-crystalline CuInS2 increases,and its band gap becomes narrower under alkaline condition.The band gaps of CuInS2 nano-particles are from 1.52 eV to 1.93 eV,which makes them promising candidates as absorber materials for photovoltaic applications.
Copper indium disulfide (CuInS2) nano-particles were synthesized by solvothermal method at 150 ℃ using copper (Ⅵ) chloride, indium chloride, thiourea and ethanol as raw materials, and characterized by X-ray diffraction (XRD) emission scanning electron microscope (FESEM), and UV-Vis spectra. The effects of pH value on its micro-structures and optical properties were investigated. The results show that with the pH value increasing, the particle size of the nano-crystalline CuInS2 increases, and its band gaps become narrower under alkaline conditions. The band gaps of CuInS2 nano-particles are from 1.52 eV to 1.93 eV, which makes them promising candidates as absorber materials for photovoltaic applications.