Cu2ZnSnS4纳米颗粒及其薄膜的制备与表征

doi:10.3724/SP.J.1077.2012.00079

无机材料学报 ›› 2012, Vol. 27 ›› Issue (1): 79-82.DOI: 10.3724/SP.J.1077.2012.00079

Cu₂ZnSnS₄纳米颗粒及其薄膜的制备与表征

罗鹏, 赵丽霞, 徐键

(宁波大学信息科学与工程学院, 宁波315211)

收稿日期:2011-06-29 修回日期:2011-08-27 出版日期:2012-01-09 网络出版日期:2011-12-19
作者简介:罗鹏(1987-), 男, 硕士研究生. E-mail: luopeng054@126.com
基金资助:
科技部项目(2006DFA52910);宁波市工业公关项目(2008B10042, 2009B21007);宁波大学王宽诚幸福基金

Preparation and Characterization of Cu₂ZnSnS₄ Nanoparticles and Films

LUO Peng, ZHAO Li-Xia, XU Jian

(Colloge of Information Science and Engineering, Ningbo University, Ningbo 315211, China)

Received:2011-06-29 Revised:2011-08-27 Published:2012-01-09 Online:2011-12-19

摘要/Abstract

摘要：

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.

关键词: 热注入, Cu₂ZnSnS₄, 纳米颗粒, 薄膜, 太阳能电池

Abstract:

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℃.

Key words: hot-injection, Cu₂ZnSnS₄, nanoparticles, thin film, solar cells

中图分类号:

O742

罗鹏, 赵丽霞, 徐键. Cu₂ZnSnS₄纳米颗粒及其薄膜的制备与表征[J]. 无机材料学报, 2012, 27(1): 79-82.

LUO Peng, ZHAO Li-Xia, XU Jian. Preparation and Characterization of Cu₂ZnSnS₄ Nanoparticles and Films[J]. Journal of Inorganic Materials, 2012, 27(1): 79-82.

图/表 5

图1 不同反应温度下CZTS纳米晶的XRD图谱

Fig. 1 XRD patterns of CZTS nanoparticles reacted at different temperatures

图2 CZTS纳米晶的拉曼光谱图

Fig. 2 Raman spectra of CZTS nanocrystals

图3 不同反应温度得到CZTS样品的TEM照片

Fig. 3 TEM images of CZTS nanocrystals reacted at different temperatures

图4 CZTS薄膜的SEM照片(a)和EDS能谱图(b)

Fig. 4 (a) SEM image and (b) EDS pattern of CZTS thin-film

图5 不同反应温度合成CZTS纳米颗粒的紫外-可见吸收光谱图

Fig. 5 UV-Vis absorption spectra of CZTS nanocrystals reacted at different temperatures Inset shows an obtained band gap of 1.5eV

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Cu₂ZnSnS₄纳米颗粒及其薄膜的制备与表征

Preparation and Characterization of Cu₂ZnSnS₄ Nanoparticles and Films

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