TiO2表面氧空位对Rup2P/TiO2/ITO薄膜电极光致电荷转移的影响

doi:10.3866/PKU.WHXB2012020111

Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (04): 850-856.doi: 10.3866/PKU.WHXB2012020111

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles Next Articles

Infection of Oxygen Vacancy at the TiO₂ Surface for Film Electrode Rup₂P/TiO₂/ITO Photo-Induced Charge Transfer

CHENG Hui^1,2, DONG Jiang-Zhou², CHAO Hui³, YAO Jiang-Hong^1,2, CAO Ya-An^1,2

1. College of Physics, Nankai University, Tianjin 300071, P. R. China;
2. Teda Applied Physics School, The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai University, Tianjin 300457, P. R. China;
3. School of Chemical and Chemistry Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China

Received:2011-11-02 Revised:2012-01-05 Published:2012-03-21
Contact: YAO Jiang-Hong E-mail:yaojh@nankai.edu.cn; caoyaan@yahoo.com
Supported by:
The project was supported by the National Natural Science Foundation of China (50872056, 51072082, 21173121, 11074129).

Abstract

Abstract: The surface properties of TiO₂-X (X=5, 10, 20, X=[NaOH] (in mol·L^-1)) samples prepared by modification of hydrolyzed TiCl₄ were studied. The surface-sensitized Ru(phen)₂(PIBH) (Rup₂P) (phen= phenanthroline, PIBH=pyridyl benzimidazole hybrid) film electrodes Rup₂P/TiO₂-5/ITO (indium tin oxide), Rup₂P/TiO₂-10/ITO, and Rup₂P/TiO₂-20/ITO were prepared. Among the three films, the photovoltaic properties of Rup₂P/TiO₂-10/ITO were the best and those of Rup₂P/TiO₂-5/ITO were the worst. The band structures, and properties on the surfaces of Rup₂P and the three TiO₂ samples were analyzed using absorption spectra, surface photovoltage spectra, photoluminescence spectra, and photocurrent action spectra. The photo-induced charge transfer process was studied by cyclic voltammetry under irradiation and photocurrent action spectra. The results revealed the oxygen vacancy at the TiO₂ surface was very important for the photo-induced charge transfer process of Rup₂P/TiO₂-X/ITO. The photocurrent mechanism of Rup₂P/TiO₂-X/ITO is discussed.

Key words: Rup₂P, TiO₂, Surface-sensitization, Rup₂P/TiO₂-X/ITO, Photo-induced charge transfer

MSC2000:

O646

CHENG Hui, DONG Jiang-Zhou, CHAO Hui, YAO Jiang-Hong, CAO Ya-An. Infection of Oxygen Vacancy at the TiO₂ Surface for Film Electrode Rup₂P/TiO₂/ITO Photo-Induced Charge Transfer[J].Acta Phys. -Chim. Sin., 2012, 28(04): 850-856.

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Infection of Oxygen Vacancy at the TiO₂ Surface for Film Electrode Rup₂P/TiO₂/ITO Photo-Induced Charge Transfer

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Infection of Oxygen Vacancy at the TiO₂ Surface for Film Electrode Rup₂P/TiO₂/ITO Photo-Induced Charge Transfer