Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (02): 413-418.doi: 10.3866/PKU.WHXB20110234

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Photovoltaic Properties and Mechanism Analysis of a Dye/Al2O3 Alternating Assembly Structure by Electrochemical Impedance Spectroscopy

GAO Rui, MA Bei-Bei, WANG Li-Duo, SHI Yan-Tao, DONG Hao-Peng, QIU Yong   

  1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
  • Received:2010-10-12 Revised:2010-11-18 Published:2011-01-25
  • Contact: WANG Li-Duo E-mail:chldwang@mail.tsinghua.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50873055) and National Key Basic Research and Development Program of China (973) (2009CB930602).

Abstract:

N3 dye and Al2O3 were used to form an alternating assembly structure. The current density-voltage (J-V) characterization showed that this structure improved the performance of dye- sensitized solar cells (DSCs). Electrochemical impedance spectroscopy (EIS) was used to study the internal resistance of this alternating assembly structured DSCs. The results showed that the resistance at the sensitized TiO2/electrolyte interface decreased as the number of (dye/Al2O3) units increased, and the device's conversion efficiency improved significantly. Based on the EIS results, a series of equivalent circuit models were well established to investigate the dye/Al2O3 alternating assembly structure theoretically.

Key words: Dye-sensitized solar cell, Alternating assembly structure, Equivalent circuit model

MSC2000: 

  • O649