采用热注入法,在油胺(OLA)中合成出Cu2ZnSnS4(CZTS)纳米颗粒,并在玻璃衬底上制备了薄膜,研究了不同合成温度对纳米颗粒生成的影响.通过X射线衍射仪、拉曼光谱仪、透射电子显微镜、扫描电子显微镜、紫外-可见分光光度计对所得纳米晶材料的结构与成分、颗粒大小与形貌、光吸收谱进行了测试分析.研究结果表明:采用热注入法的最佳合成温度在260℃左右,该温度下生成的多晶CZTS纳米颗粒尺寸约10 nm,分散性良好,光学禁带宽度约1.5 eV.%Cu2ZnSnS4 (CZTS) semiconductor is a promising materials for thin film solar cells. Cu2ZnSnS4(CZTS) nanoparticles were prepared via a hot-injection processing under high-purity N2 atmosphere, using Cu(acac)2, Zn(Oac)2, SnCl2·2H2O, sulfur powder as the precursors, oleylamine (OLA) as the solvent and the capping molecules. The CZTS thin films were deposited on glass substrates by drop-casting from the Sol of CZTS nanocrystals in toluene. The influence of reaction temperature on the phase structure and morphology of nanoparticles was studied. The samples were investigated by powder X-ray diffraction (XRD), Raman spectroscope, transmission electron microscope (TEM), scanning electron microscope (SEM) and UV-Vis-NIR spectroscope. The results indicated that the CZTS nanoparticles with 10 nm in size, good dispersion and an optical band gap of 1.5 eV was synthesized under the optimum reaction temperature of 260℃.
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