Effect of pH Value on the Micro-structures and Optical Properties of Nano-crystalline CuInS_2 by Solvothermal Method  

作　　者：冯嘉敏 韩建军 

机构地区：[1]Key Laboratory of Silicate Materials Science and Engineering,Ministry of Education [2]Wuhan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2010年第3期399-402,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the 973 Project (No. 2009CB939704);the Program for Changjiang Scholars and Innovative Research Team in University (No.IRT0547)

摘　　要：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（？） 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.

关 键 词：solvothermal method CuInS2 nano-particles pH value 

分 类 号：TB383.1[一般工业技术—材料科学与工程]