溶剂热法制备CuIn（SxSe1-x）2纳米粉体的微观结构与光学特性

摘要

A series of CuIn (SxSe1−x)2(x=0~1) nanoparticles were prepared by solvothermal route using indium chloride, copper chloride, sodium sulfide, selenium powders as raw materials, and ethanolamine as solvent. The phase composition, morphology and light absorption properties were characterized by X-ray Diffraction (XRD), field emission scanning electron microscopy (FESEM) and UV-Visible spectrophotometer, respectively. The results show that the major phase of the products is Chalcopyrite CuIn (SxSe1−x)2. While x is greater than 0.5, the wurtzite CuIn (SxSe1−x)2 also appears in the samples. With x increasing from 0 to 1, the morphologies of the CuIn (SxSe1−x)2 powders evolve gradually from flake to particulate and their light absorption edge is blue-shifting. Further studies reveal that the band gap of as-prepared nanoparticles vary from 1.16 eV to 1.48 eV.%以乙醇胺为溶剂，以氯化铟、氯化铜、硫化钠、硒粉为原料，采用溶剂热法制备 CuIn(SxSe1−x)2(x=0~1)纳米粉末，采用X射线衍射仪(XRD)、场发射扫描电镜(FESEM)、紫外–可见分光光度计等对该粉末的物相结构、形貌及光吸收性能进行分析与表征。结果表明：CuIn(SxSe1−x)2粉末主要为黄铜矿相结构，当S元素掺杂量x＞0.5时，粉末中出现纤锌矿相CuIn(SxSe1−x)2。随x从0增加到1，CuIn(SxSe1−x)2粉末的形貌从片簇状逐渐转变为颗粒状，其吸收边出现“蓝移”，禁带宽度从1.16 eV增大到1.48 eV。