原位热硫化法制备Cu_3SnS_4纳米薄膜及其光学性质

Preparation and optical propertyof Cu_3SnS_4 nanofilm by in-situ thermal sulfuration method

采用化学水浴法(CBD)制备了Cu_3Sn纳米薄膜,通过原位热硫化法制备了Cu_3SnS_4纳米薄膜。分别采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)与X射线能谱仪(EDS)分析了样品的组成、结构与形貌。采用紫外-可见分光光度计(UV-Vis)测试了Cu_3SnS_4样品的光学性质。结果表明,样品物相纯净、形貌均一,Cu3Sn纳米薄膜由球形纳米颗粒组成,Cu_3SnS_4纳米薄膜由片状纳米颗粒组成,Cu_3SnS_4薄膜样品在紫外-可见光区有良好的吸收性质,其光学带隙为1.70eV,适合作为太阳能电池吸收层。

Cu3SnS4 nanofilms were successfully prepared by two step method,including chemical bath deposition（CBD）of Cu3Sn nanofilms and the subsequent in-situ thermal sulfuration.The composition,structure and morphology of samples were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）and X-ray energy dispersive spectroscopy（EDS）.The optical property of Cu3SnS4 samples was evaluated using UV-Vis spectrometer.The results showed that the phases of samples were pure.Cu3Sn sample was composed of spherical nanoparticles while Cu3SnS4 sample was composed of nanosheets.Cu3SnS4 sample had good light absorption ability in the UV-Vis light wavelength range below800 nm.The optical band gap of Cu3SnS4 was about 1.70 eV,which enabled it a promising solar cell absorption layer.