Synthesis and applications of novel acceptor-donor-acceptor organic dyes with dithienopyrrole- and fluorene-cores for dye-sensitized solar cells

Duryodhan Sahu, Harihara Padhy, Dhananjaya Patra, Jen Fu Yin, Ying Chan Hsu, Jiann T.Suen Lin, Kuang Lieh Lu, Kung-Hwa Wei, Hong-Cheu Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Four novel symmetrical organic dyes (S1-S4) configured with acceptor-donor-acceptor (A-D-A) structures containing electron donating fluorene (S1 and S2) and N-alkyl dithieno[3,2-b:2′,3′-d]pyrrole (DTP) (S3 and S4) cores terminated with two anchoring cyanoacrylic acids (as electron acceptors) were synthesized and applied to dye-sensitized solar cells (DSSCs). The DSSC device based on S2 dye showed the best photovoltaic performance among S1-S4 dyes: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 76%, a short circuit current (JSC) of 12.27 mA/cm2, an open circuit voltage (VOC) of 0.61 V, a fill factor (FF) of 0.63, and an overall power conversion efficiency (η) of 4.73%. Besides, the utilization of chenodoxycholic acid (CDCA) as a co-adsorbent in the DSSC device based on S3 dye showed a significant improvement in its η value (from 3.70% to 4.31%), which is attributed to the suppression of dye aggregation on TiO2 surface and thus to increase the JSC value eventually.

Original languageEnglish
Pages (from-to)303-311
Number of pages9
JournalTetrahedron
Volume67
Issue number2
DOIs
StatePublished - 14 Jan 2011

Keywords

  • Acceptor-donor-acceptor
  • Density function theory
  • Di-anchoring dyes
  • Dye-sensitized solar cell
  • Electron lifetime

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