| Cu2ZnSnS4(CZTS)纳米微球的制备及表征 |
| Fabrication and Characterization of Cu2ZnSnS4 (CZTS) Microparticles |
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| 摘要: 为研究PVP含量对CZTS颗粒形貌以及分散性的影响,本文采用溶剂热法,以CuCl2·2H2O、Zn(Ac)2·2H2O、SnCl4·5H2O作金属源,硫脲作硫源,乙二醇为溶剂,在体系中加入不同含量的PVP,成功制备了CZTS微球。通过XRD、Raman、SEM、TEM、UV-Vis等方法检测分析CZTS纳米微球的物相、结构、形貌以及光学性能。结果表明:所得CZTS纳米颗粒具有锌黄锡矿结构;当体系中PVP含量为0.2g时,颗粒分散性较好,制备的颗粒形貌为表面嵌有纳米薄片的微球,纳米片较在体系中加入0.1gPVP更致密;光学带隙约为1.47eV,与太阳能电池所需的最佳带隙接近。最后,对表面嵌有纳米薄片的CZTS微球可能的形成机理进行了推测。 |
| 关键词: Cu2ZnSnS4 溶剂热法 PVP |
| 基金项目: 国家自然科学基金(No.51075197)资助项目。 |
| Abstract: Quaternary kesterite Cu2ZnSnS4(CZTS) micro-particles were successfully synthesized by a facile solvothermal method in ethylene glycol with the presence of Polyvinylpyrrolidone (PVP) as surfactant, using CuCl2·2H2O、Zn(Ac)2·2H2O and SnCl4·5H2O as metal precursor and thiourea as sulfur source. Different dispersion CZTS particles were obtained by different contents of PVP. The structure, morphology and absorption spectra of the as-obtained CZTS particles were characterized by means of X-ray diffraction(XRD), Raman spectroscopy, scanning electron microscopy(SEM), transmission electron microscopy(TEM), UV-V is spectroscopy. The results revealed that the structure of as-synthesized CZTS microparticles is kesterite;the morphology of CZTS has occurred a certain change with different contents of PVP. When 0.2 g of PVP was added to the reaction system, uniform and monodisperse CZTS MCs containing nanosheets were obtained. The nanosheets was more compact than the reaction system with 0.1 g of PVP. The band gap of the CZTS is about 1.47 eV, which approaches the optimum value for solar photoelectric conversion. Finally, a possible fabrication mechanisms of uniform and monodisperse CZTS MCs containing nanosheets was also inferred. |
| Keywords: Cu2ZnSnS4 solvothermal polyvinylpyrrolidone |
| 投稿时间：2013-05-02 修订日期：2013-06-19 |
| 摘要点击次数: 2296 |
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| 周超,王丹,高延敏.Cu2ZnSnS4(CZTS)纳米微球的制备及表征[J].无机化学学报,2013,29(11):2382-2386. |
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