A low-cost quasi-solid DSSC assembled with PVDF-based gel electrolyte plasticized by PC-EC & electrodeposited Pt counter electrode

作者：Wang, Xiaoqin^*; Zhang, Yong; Xu, Qiangqiang; Xu, Jinxin; Wu, Bohua; Gong, Min; Chu, Jia; Xiong, Shanxin

来源：Journal of Photochemistry and Photobiology A: Chemistry , 2015, 311: 112-117.

DOI：10.1016/j.jphotochem.2015.06.023

• Dye-sensitized solar cell
• Gel electrolyte
• Plasticizer
• Counter electrode
• Electrodeposition

A low-cost quasi-solid dye-sensitized solar cell (DSSC) with a photoelectric conversion efficiency of 1.79% was assembled using PVDF-based gel electrolyte plasticized by PC-EC and electrodeposited Pt counter electrodes. Its morphology, chemical structure, electrochemical and photoelectric properties were examined by SEM, FTIR, EIS and 1-V tests, respectively. The results showed that PC-EC plasticized gel electrolyte can greatly prevent the cc-phase formation of PVDF, and had the loose structure & many interpenetrating holes due to the effective intercalation of PC & EC into PVDF chains through their dipole interaction. It made the migration or diffusion of iodide ions to electrodes easier. Furthermore, its conductivity was increased to 234 mS/cm from 1.00 mS/cm of unplasticized gel electrolyte. V(OC)J(SC) FF & eta values of DSSC plasticized by PC-EC were all enhanced. Compared with Pt electrode obtained by thermal decomposition, electrodeposited Pt electrode had the lower charge-transfer resistance and the better contact with gel electrolyte in quasi-solid DSSC due to its orderly grain arrangement, more even, denser and larger active surface. Meanwhile, its process also had little influence on ITO sheet resistance. Thus, its quasi-solid DSSC has the higher photoelectric conversion efficiency.

• 出版日期2015-10-1
• 单位西安科技大学