高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (2): 295.

• 研究快报 • 上一篇    下一篇

CdS敏化对TiO2纳米薄膜电极光生电荷转移特性的影响

钱新明1,2, 宋庆2, 白玉白2, 李铁津2, 汤心颐2, 董绍俊1, 汪尔康1   

  1. 1. 中国科学院长春应用化学研究所电分析化学开放实验室, 长春 130022;
    2. 吉林大学化学系, 长春 130023
  • 收稿日期:1999-09-13 出版日期:2000-02-24 发布日期:2000-02-24
  • 通讯作者: 白玉白(1941年出生),男,教授,博士生导师,从事凝聚态光物理与光化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29773017)资助

Effect on the Property of the Photoinduced Carrier Transport of CdS as Sensitizer for TiO2Nanoparticulate Thin Films

QIAN Xin-Ming1,2, SONG Qing2, BAI Yu-Bai2, LI Tie-Jin2, TANG Xin-Yi2, DONG Shao-Jun1, WANG Er-Kang1   

  1. 1. Changchun Insitituteof Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. Depa rtment of Chemistry, Jilin University, Changchun 130023, China
  • Received:1999-09-13 Online:2000-02-24 Published:2000-02-24

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关键词: CdS, 敏化, TiO2纳米薄膜电极, 光生电荷转移

Abstract: The TiO2nanoparticle thin films have been sensitized in situ with CdSnanoparticles. The SPSmeasurement showed that large surface state density was present on the TiO2nanoparticles and the surface state can be efficiently decreased by sensitization as well as selecting suitable heat treatment. Both the photocurrent response and the charge recombination kinetics in TiO2thin films were strongly influenced by trapping/detrapping of surface states. The slow photocurrent response of TiO2nanoparticulate thin films upon the illumination was attributed to the trap saturation effects. The semiconductor sensitization made the slow photoresponse disappeared and the steadystate photocurrent value increased drastically, which suggested that the sensitization of TiO2thin films with CdScould get a better charge separation and provide a simple alternative to minimize the effect of surface state on the photocurrent response.

Key words: CdS, Sensitization, TiO2nanoparticulate thin films, Photoinduced carrier transport

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