Photoelectrochemical Properties of Vertically Aligned CuInS2 Nanorod Arrays Prepared via Template-Assisted Growth and Transfer

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• 作者：Wooseok Yang ; Yunjung Oh ; Jimin Kim ; Hyunchul Kim ; Hyunjung Shin ; Jooho Moon
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：8
• 期：1
• 页码：425-431
• 全文大小：443K
• ISSN：1944-8252

文摘

Although copper-based chalcopyrite materials such as CuInS₂ have been considered promising photocathodes for solar water splitting, the fabrication route for a nanostructure with vertical orientation has not yet been developed. Here, a fabrication route for vertically aligned CuInS₂ nanorod arrays from an aqueous solution using anodic aluminum oxide template-assisted growth and transfer is presented. The nanorods exhibit a phase-pure CuInS₂ chalcopyrite structure and cathodic photocurrent response without co-catalyst loading. Small particles of CdS and ZnS were conformally decorated onto CuInS₂ nanorods using a successive ion layer adsorption and reaction method. With surface modification of CdS/ZnS, the photoelectrochemical properties of CuInS₂ nanorod arrays are enhanced via flat-band potential shift, as determined by analyses of onset potential and Mott–Schottky plots.