Molecular design of donor-acceptor-type cruciform dyes for efficient dyes-sensitized solar cells

Min Ju Cho, Sung Soo Park, Yu Seok Yang, Jae Hong Kim, Dong Hoon Choi

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Novel donor-acceptor (D-A) type cruciform dyes were synthesized for use in a dye-sensitized solar cell. The geometries and electronic structures of the dyes were designed by the results of density functional theory (DFT) calculations. Two phenothiazine units in these dyes act as electron donors, while two cyanoacrylic acid groups act as electron acceptors. The solubility of these compounds is increased because of the presence of the hexyl groups in the phenothiazine rings. The photovoltaic properties of 14D-25A and 12A-45D were measured to identify the effects of the dye having two electron donors and two electron acceptors on the DSSC performance. The 12A-45D dye showed a power conversion efficiency of 4.5% under AM 1.5 illumination (100 mW cm-2) in an photoactive area of 0.42 cm2, short circuit current density of 10.8 mA cm-2, open circuit photovoltage of 0.65 V and a fill factor of 64%.

Original languageEnglish
Pages (from-to)1754-1760
Number of pages7
JournalSynthetic Metals
Volume160
Issue number15-16
DOIs
Publication statusPublished - 2010

Keywords

  • Cruciform dye
  • Dyes-sensitized solar cells
  • Phenothiazine
  • Power conversion efficiency

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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