Department of Physics, Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, Shanghai, People's Republic of China.
Nanotechnology. 2011 Jul 1;22(26):265615. doi: 10.1088/0957-4484/22/26/265615. Epub 2011 May 18.
We present a fast and simple protocol for large-scale preparation of quaternary Cu(2)ZnSnSe(4) (CZTSe), as well as CZTSe/Cu(2)ZnSnS(4) (CZTS) core/shell nanowires using CuSe nanowire bundles as self-sacrificial templates. CuSe nanowire bundles were synthesized by reacting Cu(2 - x)Se nanowire bundles with sodium citrate solution. CZTSe nanowires were prepared by reacting CuSe nanowire bundles with Zn(CH(3)COO)(2) and SnCl(2) in triethylene glycol. X-ray diffraction (XRD) and selected area electron diffraction studies show that stannite CZTSe is formed. The formed CZTSe nanowire bundles have diameters of 200-400 nm and lengths of up to hundreds of micrometers. CZTSe/CZTS nanocable bundles with similar morphologies were grown by the addition of some elemental sulfur to the reaction system for growth of CZTSe bundles. The stannite CZTSe/kesterite CZTS core/shell structure of the grown nanocables was confirmed by XRD and high-resolution transmission electron microscope investigation. The influence of S/Se molar ratio in the reaction system on the crystallographic structures and optical properties of CZTSe/CZTS nanocables was studied. The obtained CZTSe/CZTS core/shell nanocable bundles show broad and enhanced optical absorption over the visible and near-infrared region, which is promising for use in photovoltaic applications.
我们提出了一种快速而简单的方法，用于大规模制备四元 Cu(2)ZnSnSe(4)（CZTSe），以及 CZTSe/Cu(2)ZnSnS(4)（CZTS）核/壳纳米线，使用 CuSe 纳米线束作为自牺牲模板。CuSe 纳米线束是通过将 Cu(2-x)Se 纳米线束与柠檬酸钠溶液反应合成的。CZTSe 纳米线是通过将 CuSe 纳米线束与 Zn(CH(3)COO)(2)和 SnCl(2)在三甘醇中反应制备的。X 射线衍射（XRD）和选区电子衍射研究表明，形成了黄铜矿 CZTSe。形成的 CZTSe 纳米线束的直径为 200-400nm，长度可达数百微米。通过在反应体系中添加一些元素硫来生长 CZTSe 束，生长出具有类似形态的 CZTSe/CZTS 纳米电缆束。通过 XRD 和高分辨率透射电子显微镜研究证实了生长纳米电缆的黄铜矿 CZTSe/纤锌矿 CZTS 核/壳结构。研究了反应体系中 S/Se 摩尔比对 CZTSe/CZTS 纳米电缆的晶体结构和光学性能的影响。所获得的 CZTSe/CZTS 核/壳纳米电缆束在可见光和近红外区域表现出宽且增强的光吸收，这在光伏应用中很有前景。
