Preparation and photoelectric performance of ITO/TiO2/CdS composite thin films

被引：51

作者：

Chi, Yu-Juan ^{[1
]}

Fu, Hong-gang ^{[1
]}

Qi, Le-hui ^{[2
]}

Shi, Ke-ying ^{[2
]}

Zhang, Heng-bin ^{[2
]}

Yu, Hai-tao ^{[2
]}

机构：

[1] Harbin Inst Technol, Dept Appl Chem, Harbin 150001, Peoples R China

[2] Heilongjiang Univ, Sch Chem & Mat Sci, Harbin 150080, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2008年 / 195卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

electrodeposition; titanium dioxide; cadmium sulfide; photocurrent response;

D O I：

10.1016/j.jphotochem.2007.11.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

ITO/TiO2/CdS composite thin films were successfully prepared by electrodeposition of US on ITO/TiO2 substrate. The prepared ITO/TiO2/CdS thin films were characterized in detail by X-ray diffraction, surface photovoltage, and scanning electronic microscopy techniques. The results indicated that the deposited US layer with about 1:1 stoichiometry of Cd and S distributes not only on the surface with cauliflower-like structure but also the TiO2 film interior and even in the immediate proximity to the surface of ITO substrate. The UV-vis absorption spectrum results suggested that the absorption peak of the ITO/TiO2/CdS film shifts from the ultraviolet region to the visible region in comparison to that of the ITO/TiO2 film. Furthermore, by the photocurrent-potential behavior and incident monochromatic photon to current conversion efficiency measurements, it can be also noted that the deposited ITO/TiO2/CdS thin films possess higher photoelectric conversion efficiency than the ITO/TiO2 films. The sensibilization of TiO2 with US can effectively improve steady photocurrent. Therefore, the modification of US for ITO/TiO2 can strongly ameliorate the photoelectric capability of ITO/TiO2 thin film, and the prepared ITO/TiO2/CdS thin films were expected to possess more excellent photoelectrochemical performance than the ITO/TiO2 films. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：357 / 363

页数：7

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