物理化学学报 >> 2014, Vol. 30 >> Issue (8): 1495-1500.doi: 10.3866/PKU.WHXB201405051

电化学和新能源 上一篇    下一篇

高活性硫化铅电极的制备及在量子点敏化太阳能电池中的应用

张敬波1, 李盼1, 杨辉1, 赵飞燕2,3, 唐光诗2, 孙丽娜2, 林原3   

  1. 1. 天津师范大学化学学院, 天津市功能分子结构与性能重点实验室, 无机-有机杂化功能材料化学省部共建教育部重点实验室, 天津 300387;
    2. 北京化工大学, 化工资源有效利用国家重点实验室, 北京 100029;
    3. 中国科学院化学研究所光化学重点实验室, 北京分子科学国家实验室, 北京 100190
  • 收稿日期:2014-03-24 修回日期:2014-05-04 发布日期:2014-07-18
  • 通讯作者: 张敬波, 唐光诗 E-mail:jbzhang@iccas.ac.cn;tanggs@mail.buct.edu.cn
  • 基金资助:

    国家自然科学基金(20873162,21273160,51102011),天津市高等学校创新团队培养计划(TD12-5038)和天津师范大学人才引进基金(5RL116)资助项目

Preparation of a Highly Efficient PbS Electrode and Its Application in Quantum Dots-Sensitized Solar Cells

ZHANG Jing-Bo1, LI Pan1, YANG Hui1, ZHAO Fei-Yan2,3, TANG Guang-Shi2, SUN Li-Na2, LIN Yuan3   

  1. 1. Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China;
    2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
    3. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2014-03-24 Revised:2014-05-04 Published:2014-07-18
  • Contact: ZHANG Jing-Bo, TANG Guang-Shi E-mail:jbzhang@iccas.ac.cn;tanggs@mail.buct.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20873162, 21273160, 51102011), Program for Innovative Research Team in University of Tianjin, China (TD12-5038), and Program for Excellent Introduced Talents of Tianjin Normal University, China (5RL116).

摘要:

为了提高量子点敏化纳晶薄膜太阳能电池的光电转换效率,我们通过连续在酸和多硫溶液中处理铅片制备了对多硫电解液具有高电催化活性的硫化铅电极. 通过电化学阻抗谱测试评价所制备硫化铅电极的催化活性,从而确定制备高效硫化铅电极的最佳条件. 以在最佳条件下制备的硫化铅为对电极、CdSe量子点敏化TiO2纳晶薄膜为工作电极和多硫电解液组装成量子点敏化太阳能电池. 光电性能测试结果表明所制备的电极具有良好的催化活性和光电转换性能. 与已报导的方法相比,新方法大幅度地减少制备过程所需的时间,但却提高了所制备的硫化铅对电极的催化活性. 通过X射线衍射和扫描电镜测试表征了硫化铅的生成过程,探讨了催化活性提高的原因.

关键词: 硫化铅电极, 催化活性, 多硫电解液, 硒化镉量子点敏化太阳能电池, 光电转换效率

Abstract:

To improve the light-to-electric conversion efficiency of quantum dots-sensitized nanocrystalline thin-film solar cells, a PbS electrode with high electrocatalytic activity toward polysulfide electrolyte was prepared by successively treating Pb foil in acid and polysulfide solutions. Electrochemical impedance spectroscopy (EIS) measurements were performed to evaluate the electrocatalytic activity of the prepared PbS electrode. Based on the EIS results, the temperature and time to treat the Pb foil in the acid solution were optimized. The PbS electrode prepared under the optimized conditions was used as a counter electrode to fabricate a quantumdotssensitized solar cell with a CdSe quantum dots-sensitized TiO2 nanocrystalline thin film as the photoanode and polysulfide solution as the electrolyte. Both the electrocatalytic activity and light-to-electric conversion properties of the PbS electrode prepared from acid treatment of Pb foil for the optimized temperature and time are superior to those of electrodes prepared by other reported methods. In our method, the treatment time is considerably less but the PbS counter electrode maintains a superior catalytic activity compared with other methods. X-ray diffraction and scanning electron microscopy were performed to demonstrate the formation process of PbS, and the catalytic enhancement mechanism of the prepared PbS electrode is discussed.

Key words: PbS electrode, Catalytic activity, Polysulfide electrolyte, CdSe quantum dots-sensitized solar cell, Photoelectric conversion efficiency

MSC2000: 

  • O646