Efficient thieno[3,2-a]carbazole-based organic dyes for dye-sensitized solar cells

Hua Jiang, Kazuaki Oniwa, Ashraful Islam, Jian Zhao, Liyuan Han, Ying Ji Sun, Ming Bao, Naoki Asao, Yoshinori Yamamoto, Tienan Jin

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Abstract A new series of donor-π-acceptor organic dyes based on thieno[3,2-a]carbazole as a new donor moiety, designated as JH-dyes, has been synthesized for dye-sensitized solar cells (DSCs). The photophysical properties and DSC performances of JH-dyes have been characterized. Among the three JH-dyes, a high power conversion efficiency (η) of 8.04% with a short-circuit current (Jsc) of 14.08 mA cm-2 and an open-circuit voltage (Voc) of 0.78 V has been achieved for DSC based on JH03 bearing hexyl chains on the terthiophene π-linker. The electrochemical impedance spectra (EIS) and intensity-modulated photovoltage spectroscopy (IMVS) of JH-cells were measured to understand the effect of molecular structure on charge transfer process and electron life time.

Original languageEnglish
Article number26621
Pages (from-to)6534-6540
Number of pages7
Issue number37
Publication statusPublished - 2015 Aug 7


  • Charge transfer
  • Donor-π-acceptor
  • Dye-sensitized solar cell
  • Molecular planarity
  • Thieno[3,2-a]carbazole


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