TCO-free conducting polymers/carbon cloths as the flexible electro-catalytic counter electrodes for dye-sensitized solar cells

Chun Ting Li, Yi Feng Lin, I. Ting Chiu, Kuo Chuan Ho*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

29 引文 斯高帕斯(Scopus)

摘要

Three kinds of water-soluble conducting polymers (CPs), including polypyrrole-block-poly(caprolactone) (PPy:PCL), poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and sulfonated poly(thiophene-3-[2-(2-methoxyethoxy)ethoxy]-2,5-diyl) (s-PT), were used to decorate on the surface of fluorine-doped tin oxide (FTO) or carbon cloth (CC) separately; they were denoted as PPy:PCL/FTO, PEDOT:PSS/FTO, s-PT/FTO, PPy:PCL/CC, PEDOT:PSS/CC, and s-PT/CC and were used as the electro-catalytic counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). When a DSSC is coupled with a CP-coated CC as a CE, a higher solar-to-electricity conversion efficiency (η) can be obtained than that of the cell with the same CP-coated FTO as the CE. This is due to the fact that the networked carbon fibers in a CC substrate provided large surface areas, high conductivity, and directional electron transfer pathways simultaneously. Therefore, the networked carbon fibers in a CC substrate worked as the conductive cores, while the coated CPs played the important role as the electro-catalytic shell for triggering reduction of I3-. Among all the electrodes, the s-PT/CC renders the best η of 8.45% to its DSSC, even better than that of the cell with the traditional Pt/FTO CE, due to (1) the good intrinsic electro-catalytic ability of s-PT toward I3- reduction, (2) the good conductivity of s-PT in the absence of any non-conducting component (e.g., the PCL in PPy:PCL or the PSS in PEDOT:PSS), and (3) the large surface area and orientated electron transfer pathways provided by the CC substrate. It was concluded that the low-cost, highly efficient, and flexible s-PT/CC electrode was an attractive substitution for the expensive Pt/FTO electrode. Moreover, the extra low-weight s-PT/CC electrode was very suitable for the large-scale roll-to-roll process, which benefits the future industrialization of the DSSCs.

原文英語
頁(從 - 到)24479-24486
頁數8
期刊Journal of Materials Chemistry A
3
發行號48
DOIs
出版狀態已發佈 - 2015
對外發佈

ASJC Scopus subject areas

  • 化學 (全部)
  • 可再生能源、永續發展與環境
  • 材料科學(全部)

指紋

深入研究「TCO-free conducting polymers/carbon cloths as the flexible electro-catalytic counter electrodes for dye-sensitized solar cells」主題。共同形成了獨特的指紋。

引用此