An efficient light-harvesting ruthenium dye for solar cell application

Shi Jhang Wu, Chia Yuan Chen, Jian Ging Chen, Jheng Ying Li, Yung Liang Tung, Kuo Chuan Ho, Chun Guey Wu

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

A novel, heteroleptic ruthenium dye comprising a vinyl group between the carboxylate and bipyridine segments as well as extended π-conjugation of the ancillary ligand, employing alkyl-bithiophene, was synthesized. The dye displayed a remarkably high absorption coefficient of 2.51 × 104 M-1 cm-1 (at 562 nm) for its metal-to-ligand charge transfer band. The photo-to-current conversion efficiency of the corresponding dye-sensitized solar cell was 9.12% under AM 1.5 (100 mW/cm2) irradiation. Furthermore, owing to both the very strong metal-to-ligand charge transfer band and the large number of dye molecules adsorbed on the TiO2 electrode, the conversion efficiency of the dye-sensitized cell was >7.5% at a light intensity ≤198 mW cm-2.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
JournalDyes and Pigments
Volume84
Issue number1
DOIs
StatePublished - Jan 2010

Keywords

  • Conjugation
  • Dye-sensitized solar cell
  • Heteroleptic
  • High-efficiency
  • Ruthenium
  • Thiophene

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