物理化学学报 >> 2011, Vol. 27 >> Issue (02): 413-418.doi: 10.3866/PKU.WHXB20110234

电化学和新能源 上一篇    下一篇

电化学阻抗谱研究染料/Al2O3交替组装结构的光伏特性及作用机理

高瑞, 马蓓蓓, 王立铎, 史彦涛, 董豪鹏, 邱勇   

  1. 清华大学化学系, 有机光电子及分子工程教育部重点实验室, 北京 100084
  • 收稿日期:2010-10-12 修回日期:2010-11-18 发布日期:2011-01-25
  • 通讯作者: 王立铎 E-mail:chldwang@mail.tsinghua.edu.cn
  • 基金资助:

    国家自然科学基金(50873055)和国家重点基础研究发展规划项目(973) (2009CB930602)资助

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).

摘要:

使用Al2O3和N3染料制备了一种交替组装的结构, 该结构能够提高染料敏化太阳能电池(DSCs)的开路电压(Voc), 短路电流(Jsc)和转换效率(η). 为了研究(染料/Al2O3)交替组装结构的作用机理, 使用电化学阻抗谱技术分析了电池的界面电阻. 分析结果表明, 随着交替组装结构中(染料/Al2O3)单元的增加, 光阳极/染料/电解质界面的电阻降低, 电池性能随之提高. 基于电化学阻抗谱分析结果, 建立了一系列的等效电路模型, 从理论上解释了(染料/Al2O3)交替组装结构的作用机理.

关键词: 染料敏化太阳能电池, 交替组装结构, 等效电路模型

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