Aligned ZnO/CdTe Core-Shell Nanocable Arrays on Indium Tin Oxide: Synthesis and Photoelectrochemical Properties
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摘要Vertically aligned ZnO/CdTe core-shell nanocable arrays-on-indium tin oxide (ITO) are fabricated by electrochemical deposition of CdTe on ZnO nanorod arrays in an electrolyte close to neutral pH. By adjusting the total charge quantity applied during deposition, the (die shell thickness can be tuned from several tens to hundreds of nanometers. The (die shell, which has a zinc-blende structure, is very dense and uniform both radially and along the axial direction of the nanocables, and forms an intact interface with the wurtzite ZnO nanorod core. The absorption of the (die shell above its band gap (similar to 1.5 eV) and the type II band alignment between the CdTe shell and the ZnO core, respectively, demonstrated by absorption and photoluminescence measurements, make a nanocable array-on-ITO architecture a promising photoelectrode with excellent photovoltaic properties for solar energy applications. A photocurrent density of similar to 5.9 mA/cm(2) has been obtained under visible light illumination of 100 mW cm(-2) with zero bias potential (vs saturated calomel electrode). The neutral electrodeposition method can be generally used for plating CdTe on nanostructures made of different materials, which would be of interest in various applications.
著者Wang XN, Zhu HJ, Xu YM, Wang H, Tao Y, Hark S, Xiao XD, Li QA
期刊名稱ACS Nano
出版年份2010
月份6
日期1
卷號4
期次6
出版社American Chemical Society
頁次3302 - 3308
國際標準期刊號1936-0851
電子國際標準期刊號1936-086X
語言英式英語
關鍵詞CdTe; electrodeposition; nanocable; photovoltaic; type II band alignment; ZnO
Web of Science 學科類別Chemistry; Chemistry, Multidisciplinary; CHEMISTRY, MULTIDISCIPLINARY; Chemistry, Physical; CHEMISTRY, PHYSICAL; Materials Science; Materials Science, Multidisciplinary; MATERIALS SCIENCE, MULTIDISCIPLINARY; Nanoscience & Nanotechnology; NANOSCIENCE & NANOTECHNOLOGY; Science & Technology - Other Topics

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