Large-scale synthesis and phase transformation of CuSe, CuInSe2, and CuInSe2/CuInS2 core/shell nanowire bundles

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

117 Scopus Citations
View graph of relations

Author(s)

  • Jun Xu
  • Yong-Bing Tang
  • Xue Chen
  • Zhen-Hua Chen
  • Shuit-Tong Lee
  • Weixin Zhang
  • Zeheng Yang

Detail(s)

Original languageEnglish
Pages (from-to)1845-1850
Journal / PublicationACS Nano
Volume4
Issue number4
Publication statusPublished - 27 Apr 2010

Abstract

Facile chemical approaches for the controllable synthesis of CuSe, CuInSe2 nanowire, and CuInSe2/CuInS2 core/shell nanocable bundles were developed. Hexagonal CuSe nanowire bundles with lengths up to hundreds of micrometers, consisting of many aligned nanowires with a diameter of about 10-15 nm, were prepared by reacting cubic Cu2-xSe nanowire bundles with a sodium citrate solution at room temperature. The CuSe nanowire bundles were then used as self-sacrificial templates for making bundles of tetragonal chalcopyrite CuInSe2 nanowires by reacting with InCl3 via a solvothermal process. Furthermore, bundles of CuInSe 2/CuInS2 core/shell nanocables were obtained by adding sulfur to the reaction system, and the shell thickness of the polycrystalline CuInS2 in the nanocables increased with increasing S/Se molar ratios. It was found that the small radius of copper ions allows their fast outward diffusion from the interior to the surface of nanowires to react with sulfur atoms/anions and indium ions to form a CuInS2 shell. Enhanced optical absorption in the vis-NIR region of CuInSe2/CuInS2 core/shell nanocable bundles is demonstrated, which is considered beneficial for applications in optoelectronic devices and solar energy conversion. © 2010 American Chemical Society.

Research Area(s)

  • Bundles, Core/shell nanocables, CuInS2, CuInSe2, CuSe, Phase transformation

Citation Format(s)

Large-scale synthesis and phase transformation of CuSe, CuInSe2, and CuInSe2/CuInS2 core/shell nanowire bundles. / Xu, Jun; Lee, Chun-Sing; Tang, Yong-Bing; Chen, Xue; Chen, Zhen-Hua; Zhang, Wen-Jun; Lee, Shuit-Tong; Zhang, Weixin; Yang, Zeheng.

In: ACS Nano, Vol. 4, No. 4, 27.04.2010, p. 1845-1850.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review