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Volume 41 Issue 7
Jul.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(7): 1322-1329.
QUAN Linlin, LI Weiping, GENG Huifang, et al. Influence of quantum dots and TiO2 photoanode parameters on electron lifetimes and performance of photonode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(7): 1322-1329. doi: 10.13700/j.bh.1001-5965.2014.0541(in Chinese)
Citation: QUAN Linlin, LI Weiping, GENG Huifang, et al. Influence of quantum dots and TiO2 photoanode parameters on electron lifetimes and performance of photonode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(7): 1322-1329. doi: 10.13700/j.bh.1001-5965.2014.0541(in Chinese)
shu

Influence of quantum dots and TiO2 photoanode parameters on electron lifetimes and performance of photonode

doi: 10.13700/j.bh.1001-5965.2014.0541

  • School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 04 Sep 2014
  • Rev Recd Date: 26 Sep 2014
  • Publish Date: 20 Jul 2015
    Abstract
  • Effects of film thickness of P25TiO2 photoanode, different types of quantum dots sensitized and method of quantum dots co-sensitization, which are the factors of interest, on P25TiO2 photoanode were analyzed. The relationship between P25TiO2 film thickness and electron lifetimes were investigated by the method of successive ionic layer absorption and reaction (SILAR). Besides, the influence of quantum dots type and method of quantum dots co-sensitization on photoelectrochemical performance of photoanode was studied. Electrochemical impedance spectra (EIS), open circuit voltage decay (OCVD) and UV-Vis absorption spectra were used to measure and analyze the factors which influence the photoelectrochemical performance and electron lifetimes of P25TiO2 photoanode. The results indicate that P25TiO2 with the film thickness of 12μm exhibits the minimum recombination losses and longer electron lifetimes. Furthermore, the short circuit current and power conversion efficiency of co-sensitized photoanode (TiO2/CdS/CdSe/ZnS) increase 34% and 42% respectively compared to those of single sensitized photoanode (TiO2/CdS). Besides, appropriate film thickness of P25TiO2 photoanode and method of co-sensitization are important factors to increase the electron lifetimes of photoanode, the absorption spectrum and intensity of photoanode.

     

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