Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (07): 1797-1802.doi: 10.3866/PKU.WHXB201205081

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles    

Electron Transport Properties of One-Dimensional Structural SnO2 Belts

LI Xiao-Ning1,2, BAI Shou-Li1, YANG Wen-Sheng1, CHEN Ai-Fan1, SUN Li-Na1, LIN Yuan2, ZHANG Jing-Bo2,3   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
    2. Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    3. Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China
  • Received:2012-03-02 Revised:2012-05-08 Published:2012-06-07
  • Contact: BAI Shou-Li, ZHANG Jing-Bo E-mail:jbzhang@iccas.ac.cn; baisl@mail.buct.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20873162, 51102011) and Natural Science Foundation of Beijing, China (8102028, 8112022).

Abstract:

Well-crystallized one-dimensional (1D) structural SnO2 belts are synthesized using a simple water-assisted chemical vapor deposition method. To increase the yield of SnO2 belts, small Sn particles with and without Au-modifications are used as source materials to grow different width SnO2 belts. Dye-sensitized solar cells (DSSCs) fabricated using the composite (nanoparticle/nanobelt) SnO2 thin films, are used to evaluate the electron transport properties of the SnO2 belts. Pastes containing different ratios of nanoparticles and belts are used to prepare the composite film by the doctor-blade method. The DSSCs exhibit different photovoltaic performances which are dependent on the nanoparticle/nanobelt ratio and width of the SnO2 belts in the thin film. The enhanced electron transport properties of the composite films containing the SnO2 belts is evaluated using intensity modulated photocurrent spectroscopy (IMPS). 1D SnO2 belts with a particular belt width improve the photovoltaic performance by providing electron paths to accelerate electron transport in the composite nanocrystalline thin films.

Key words: One-dimensional structural SnO2 belt, Electron transport, Composite nanocrystalline thin film, Dye-sensitized solar cell, Photovoltaic performance

MSC2000: 

  • O646