New fabrication process of long-life dye-sensitized solar cells by in situ gelation of quasi-solid polymer electrolytes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Kuei-Fu Chen
  • Chien-Hung Liu
  • Chien-Kuo Hsieh
  • Cian-Li Lin
  • Hsin-Kai Huang
  • Chuen-Horng Tsai

Detail(s)

Original languageEnglish
Pages (from-to)939-946
Journal / PublicationJournal of Power Sources
Volume247
Online published18 Sep 2013
Publication statusPublished - 1 Feb 2014
Externally publishedYes

Abstract

Leakage of liquid electrolyte and damage to dye-sensitized solar devices due to ultraviolet irradiation typically result in the poor long-term stability of liquid-electrolyte-based dye-sensitized solar cells (DSSCs). In this study, a simple in situ gelation (ISG) process is developed for the quasi-solid-state electrolyte (QSE) in DSSCs using polyvinyl butyral (PVB), a polymer used worldwide in laminated glass. The diffusion coefficients and ionic conductivities of the QSEs are analyzed, and the optimal ionic conductivity is found to be approximately 2.64 × 10-3 S cm-1, which is approximately six orders of magnitude higher than that of the original PVB thin film. The ISG-QSE devices exhibit a high conversion efficiency of 4.86% at 100 mW cm-2; this is approximately 98% of the efficiency of corresponding liquid electrolyte (LSE) cells. Moreover, the devices can maintain a remarkable 98% of their original efficiency after 2100 working hours owing to the addition of 5% UV absorber to the ISG electrolyte. In addition, the ISG-electrolyte-based DSSCs can drive a 5 × 5 cm2 electrochromic (EC) device, demonstrating the potential for the application of this combination in "smart windows" in the future.

Research Area(s)

  • ECD, In-situ, Long-term, PVB, Quasi-solid, UV

Citation Format(s)

New fabrication process of long-life dye-sensitized solar cells by in situ gelation of quasi-solid polymer electrolytes. / Chen, Kuei-Fu; Liu, Chien-Hung; Hsieh, Chien-Kuo; Lin, Cian-Li; Huang, Hsin-Kai; Tsai, Chuen-Horng; Chen, Fu-Rong.

In: Journal of Power Sources, Vol. 247, 01.02.2014, p. 939-946.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review