Donor-acceptor dyes with fluorine substituted phenylene spacer for dye-sensitized solar cells

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

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Author(s)

  • Bo-So Chen
  • Dong-Yi Chen
  • Chao-Ling Chen
  • Che-Wei Hsu
  • Hui-Chu Hsu
  • Kuan-Lin Wu
  • Shih-Hung Liu
  • Pi-Tai Chou

Detail(s)

Original languageEnglish
Pages (from-to)1937-1945
Journal / PublicationJournal of Materials Chemistry
Volume21
Issue number6
Online published3 Dec 2010
Publication statusPublished - 14 Feb 2011
Externally publishedYes

Abstract

A new series of organic sensitizers LJB-H, LJB-Fo and LJB-Fm with triphenylamine, 3,4-ethylenedioxythiophene plus various functionalized phenylenes, and cyanoacrylic acid as the donor, π-spacer, and anchoring group, respectively. These organic sensitizers exhibit much higher molar extinction coefficients than the parent LJ1 dye as well as reveal a remarkable fluorine substituent effect. LJB-Fm with fluoro substitution at the meta position relative to cyanoacrylic acid possesses a lower S0–S1 gap and weaker coupling with the TiO2 electrode (cf. LJB-H and LJB-Fo). Conversely, due to the resonance effect with respect to cyanoacrylic acid, the ortho-F-substituted LJB-Fo has a larger energy gap but stronger TiO2 affinity. As a result, LJB-Fo shows better DSSC performance with Jsc = 15.58 mA cm−2, Voc = 787 mV, FF = 0.67 and η = 8.22%.

Citation Format(s)

Donor-acceptor dyes with fluorine substituted phenylene spacer for dye-sensitized solar cells. / Chen, Bo-So; Chen, Dong-Yi; Chen, Chao-Ling; Hsu, Che-Wei; Hsu, Hui-Chu; Wu, Kuan-Lin; Liu, Shih-Hung; Chou, Pi-Tai; Chi, Yun.

In: Journal of Materials Chemistry, Vol. 21, No. 6, 14.02.2011, p. 1937-1945.

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