Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (02): 408-412.doi: 10.3866/PKU.WHXB20110237

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Room Temperature Synthesis of Rutile TiO2 and Its Application in Dye-Sensitized Solar Cells

LIU Jia1,2, YANG Hao-Tian1,2, ZHANG Jing-Bo1, ZHOU Xiao-Wen1, LIN Yuan1   

  1. 1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2010-10-15 Revised:2010-12-03 Published:2011-01-25
  • Contact: LIN Yuan E-mail:linyuan@iccas.ac.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2006CB202605), High-Tech Research and Development Program of China (983) (2007AA05Z439), and National Natural Science Foundation of China (20973183).

Abstract:

We prepared rutile TiO2 powders of good crystallinity by hydrolyzing a Ti(OC4H9)4 precursor at room temperature and by reprecipitation. X-ray diffraction (XRD) revealed that higher acidity, lower temperature, and specific amounts of Cl- as a medium result in rutile TiO2. This rutile TiO2 has an irregular rice-like structure. After adding the P105 (EO37PO56EO37) tri-block copolymer as a structural agent, the rutile TiO2 aggregated to form rough 350 nm spheres. These rough spheres have a greatly enhanced light harvesting efficiency and improved energy conversion efficiency in dye-sensitized solar cells. This is due to their high light scattering effect and larger surface area (109.5 m2·g-1). By adding these large rutile spheres at a mass fraction of 25% to the over-layer of a TiO2 film composed of ~20 nm TiO2 particles as light scattering centers, the energy conversion efficiency of the dye-sensitized solar cells (DSSC) was 7.27%. This is a 17% increase in conversation efficiency compared with the DSSC based on a TiO2 photoanode without these rough rutile spheres.

Key words: Dye-sensitized solar cell, TiO2, Rutile, Scattering layer

MSC2000: 

  • O649