催化学报 ›› 2014, Vol. 35 ›› Issue (2): 219-226.DOI: 10.1016/S1872-2067(12)60737-2

• 研究论文 • 上一篇    下一篇

丝网印刷法制备高催化活性对电极

赵春雨a, 史彦涛a, 钟志勇b, 马廷丽a,b   

  1. a 大连理工大学化学学院精细化工国家重点实验室, 辽宁大连116024;
    b 营口奥匹维特新能源科技有限公司, 辽宁营口115003
  • 收稿日期:2013-07-05 修回日期:2013-10-23 出版日期:2014-01-16 发布日期:2014-01-17
  • 通讯作者: 史彦涛, 马廷丽
  • 基金资助:

    国家自然科学基金(51273032);国家高新技术研究发展计划(863计划,2009AA03Z220);中央高校基本科研业务费专项资金资助(DUT12RC(3)57).

Screen-printed Pt counter electrodes exhibiting high catalytic activity

Chunyu Zhaoa, Yantao Shia, Zhiyong Zhongb, Tingli Maa,b   

  1. a State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China;
    b Yingkou Opvtech New Energy Co. Ltd., Yingkou 113003, Liaoning, China
  • Received:2013-07-05 Revised:2013-10-23 Online:2014-01-16 Published:2014-01-17
  • Contact: Yantao Shi,Tingli Ma
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51273032), the National High Technology Research and Development Program of China (2009AA03Z220), and the Fundamental Research Funds for the Central Universities (DUT12RC(3)57).

摘要:

对电极在染料敏化太阳能电池(DSCs)中主要起催化氧化还原反应及收集电荷的作用,铂对电极常用的制备方法为磁控溅射法,但其成本较高,制备条件苛刻. 本文通过引入低成本的表面活性剂Span-85,所制得的铂对电极的附着力、透光率和均匀性显著改善,实现了面积可控,与两步浸泡法和旋涂热解法制备的对电极在DSCs中的光电转换效率分别为7.30%,6.96%和7.03%. 紫外-可见吸收光谱、扫描电镜和附着力测试等结果表明,(1)添加表面活性剂有利于增加附着力及改善透光率和均匀性;(2)使用该法制备的Pt/FTO对电极的透光率与两步浸泡法制作的相同,且铂粒子分布更加均匀. 电化学阻抗图谱、塔菲尔极化曲线和循环伏安曲线结果表明,丝网印刷方法制备的Pt/FTO对电极具有更加优异的催化性能,且该法更有利于降低其生产成本和大规模生产.

关键词: 对电极, 附着力, 均匀性, 简易可控, 染料敏化太阳能电池

Abstract:

Counter electrodes (CEs) for dye-sensitized solar cells (DSCs) are important for collecting electrons and catalyzing the iodide/tri-iodide reaction. Pt CEs are commonly prepared by magnetron sputtering, which is expensive and requires vacuum conditions. Incorporating the low cost surfactant Span-85 improved the adhesion between the Pt particles and conductive substrate, and allowed Pt-based CEs to be screen-printed. The screen-printed CE was compared with those prepared by dip-coating and spin-coating. Photoelectric conversion efficiencies of 7.30%, 6.96% and 7.03% were achieved for DSCs containing screen-printed, dip-coated and spin-coated CEs, respectively. Optical transmittance measurements, scanning electron microscopy, and film adhesion tests results showed that the surfactant improved film adhesion and increased transmittance, and the screen-printed CEs exhibited comparable transmittance to the dip-coated CEs. Screen-printing resulted in Pt particles being more uniformly distributed on the substrate, when compared with dip-coating or spin-coating. Cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel-polarization curves showed that the catalytic activity of the screen-printed Pt-based CEs were higher than that of the other CEs. Screen-printing is suitable for realizing the low-cost large-scale production of large Pt-based CEs.

Key words: Counter electrode, Adhesion uniformity, Controllable, Dye-sensitized solar cell