Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (8): 832-838.DOI: 10.15541/jim20170490

Special Issue: 电催化研究 光伏材料

• Orginal Article • Previous Articles     Next Articles

Application of Transparent Cobalt Sulfide Counter Electrodes in Dye-sensitized Solar Cells

JIANG Qing-Song1, 2, 3, CHEN Ruo-Ting2, LI Wen-Bo2, CHENG Wen-Jie2, HUANG Ye-Xiao2, HU Guang2   

  1. 1. Jiangsu Engineering Laboratory for Lake Environment Remote Sensing Technologies, Faculty of electronic information engineering, Huaiyin Institute of Technology, Huai'an 223003, China;
    2. Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huai'an 223003, China;
    3. Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai'an 223003, China;
  • Received:2017-10-17 Revised:2017-12-09 Online:2018-08-28 Published:2018-07-17
  • About author:JIANG Qing-Song. E-mail: jiangqingsong05@hyit.edu.cn
  • Supported by:
    National Natural Science Foundation of China (61704063);National Training Program of Innovation and Entrepreneurship for Undergraduates (201711049004Z)

Abstract:

Cobalt sulfide nanomaterials are considered as important counter electrode materials for dye-sensitized solar cells. A potential reversal electrodeposition technique was applied to fabricate transparent cobalt sulfide film with fluorine-doped tin oxide glass as substrate. The experimental results demonstrate that the surface morphology of cobalt sulfide films is mainly dependent on the pH value of plating solution. The thickness of cobalt sulfide films can be effectively controlled by electrodeposition cycles. Then, cobalt sulfide films were used as counter electrodes of dye-sensitized solar cells. Electrochemical measurements prove that cobalt sulfide counter electrodes exhibit high electrocatalytic activity. In particular, under electrodeposition condition of pH 7.2 and 12 cycles, cobalt sulfide counter electrode composed of the nanosheet structure exhibits higher electrocatalytic activity than platinum electrode, due to the increase of electrocatalytic active sites. Meanwhile, remarkable photoelectrical conversion efficiency of the dye-sensitized solar cell based on cobalt sulfide counter electrode is up to 7.26% with an average value of 7.18% for ten devices, which is higher than that of the dye-sensitized solar cell equipped with platinum electrode (6.94%).

 

Key words: counter electrode, cobalt sulfide, potential reversal electrodeposition technique, sheet morphology

CLC Number: