化学学报 ›› 2012, Vol. 70 ›› Issue (07): 903-910 .DOI: 10.6023/A1109032 上一篇    下一篇

研究论文

Cu2ZnSnS4 纳米晶的制备及其三阶非线性光学性能的研究

王芸a, 梁晓娟a, 蔡倩a, 冯丽a, 邵明国a, 钟家松b, 向卫东a,b   

  1. a 温州大学化学与材料工程学院 温州 325035;
    b 同济大学材料科学与工程学院 上海 201804
  • 收稿日期:2011-09-03 修回日期:2011-12-25 出版日期:2012-04-14 发布日期:2012-04-23
  • 通讯作者: 梁晓娟, 向卫东 E-mail:xiangweidong001@126.com
  • 基金资助:

    国家自然科学基金(Nos. 50772075, 50972107)和浙江省科技创新团队项目(No. 2009R50010).

Synthesis of Cu2ZnSnS4 Nanocrystals and Its Third-order Nonlinear Optical Properties

Wang Yuna, Liang Xiaojuana, Cai Qiana, Feng Lia, Shao Mingguoa, Zhong Jiasongb, Xiang Weidonga,b   

  1. a College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035 China;
    b College of Materials Science and Engineering, Tongji University, Shanghai 201804 China
  • Received:2011-09-03 Revised:2011-12-25 Online:2012-04-14 Published:2012-04-23
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 50772075, 50972107) and Zhejiang Province Key Scientific and Technological Innovations Team of China (No. 2009R50010).

以乙酰丙酮铜、醋酸锌、二氯亚锡、油胺和硫粉为前驱体, 采用one-pot 法合成出了单分散的Cu2ZnSnS4 (CZTS)纳米晶. 所得样品采用X 射线粉末衍射仪(XRD), 能量色散谱仪(EDS), 透射电子显微镜(TEM), 高分辨透射电子显微镜(HRTEM), 光电子能谱仪(XPS), 紫外-可见光谱仪(UV-vis)和Z-扫描(Z-scan)技术对其结构组成、形貌、性能等进行了表征. 结果表明: 所获得的产物为四方相结构的六边形CZTS 纳米颗粒, 直径约为10 nm. 计算出尺寸大小为10 nm,13 nm 的纳米晶的三阶非线性光学折射率γ (-1.08×10-15, -9.08×10-17 m2·W-1), 三阶非线性光学吸收系数β (6.5×10-9, 3.69×10-11 m·W-1)以及三阶非线性光学极化率χ(3) (1.49×10-9, 4.35×10-10 esu). 并探讨了CZTS 纳米晶可能的形成机理, 及引起三阶光学非线性发生变化的原因.

关键词: 铜锌锡硫, 纳米晶, 三阶非线性光学

Monodisperse Cu2ZnSnS4 (CZTS) nanocrystals were synthesized by one-pot method using copper( II) acetylacetonate, zinc(II) acetate, tin(II) chloride, S powder and oleylamine as precursors. The composition, structure, morphology and properties of the CZTS were characterized by X-ray diffraction (XRD), energy dispersive X-ray (EDS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV-vis and Z-scan technology. The results showed that the as-prepared CZTS nanocrystals were tetragonal phase with hexagonal shape and particle size about 10 nm. The nonlinear refraction index γ (-1.08×10-15, -9.08×10-17 m2·W-1), nonlinear absorption coefficient β (6.5×10-9, 3.69×10-11 m·W-1) and third-order optical susceptibility χ(3) (1.49× 10-9, 4.35×10-10 esu) of CZTS nanocrystals with different size (10 nm, 13 nm) were calculated. Finally, the growth mechanism of nanocrystals and the nonlinear optical properties were investigated.

Key words: Cu2ZnSnS4, nanocrystals, third-order nonlinear optical