Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (7): 739-744.doi: 10.15541/jim20150576

• Orginal Article • Previous Articles     Next Articles

Optimization of Dye-sensitized Solar Cells Prepared by Pechini Sol-Gel Method

Yue-Feng YIN1(), Gui-Jie LIANG1(), Qiang ZHANG1, Zheng PAN1, Wang-Nan LI1, Zai-Fang LI2   

  1. 1. Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 441053, China
    2. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2015-11-24 Revised:2016-02-01 Online:2016-07-20 Published:2016-06-22
  • About author:YIN Yue-Feng. E-mail: lgj511011@163.com
  • Supported by:
    Natural Science Foundation of Hubei Province (2013CFB064);National Natural Science Foundation of China (51502085)

Abstract:

Functional TiO2 films were prepared by using a facile one-step Pechini Sol-Gel method. The intrinsical contribution mechanism of film thickness to the photo-to-electric performance of DSSC was explored with analysis of interfacial charge recombination effects, on which, the characteristics of DSSC were optimized via film thickness controlling. The influence of TiO2 film thickness on dye absorption, charge recombination process and photovoltaic performance of DSSC were by UV-Vis, electrochemical impedance spectroscopy and I-V test under dark condition, respectively. The results show that as TiO2 film thickness increases, the light harvesting efficiency and photocurrent of DSSC increase, which were induced by the enhancement of dye absorption. However, the photovoltage decreases gradually with the increaese of electron recombination probability. As an increase, combination of the positive and negative effects above enables the Pechini-type DSSC efficiency first increase and then decline, with an optimum efficiency of 7.75% at the film thickness of 10.7 μm, in contrast to 6.5% of the routine method.

Key words: dye-sensitized solar cells, pechini Sol-Gel method, TiO2 film thickness, interfacial charge recombination

CLC Number: 

  • TM914