Oligothiophene-multifullerene linkage molecules as high performance photovoltaic materials

N. Negishi, K. Takimiya, T. Otsubo, Y. Harima, Y. Aso

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Novel long oligothiophenes incorporated with four fullerenes (2C 60-16T-2C60 and 2C60-24T-2C60) have been synthesized with the aim of developing good single-component photovoltaic materials. The tetracosithiophene derivative 2C60-24T-2C 60, despite its giant structure, is rather more tractable regarding solubility than the hexadecithiophene derivative 2C60-16T-2C 60. The electronic absorption and emission spectra of 2C 60-24T-2C60 indicated no electronic interaction in the ground state but efficient intramolecular electron transfer in the excited state. The sandwich device of the Al/2C60-24T-2C60/Au structure showed a marked photocurrent upon illumination with monochromatic light from the Al side. The incident-photon to converted-electron ratio (IPCE) is 14%.

Original languageEnglish
Pages (from-to)125-128
Number of pages4
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - 2005 Sept 20


  • Amorphous thin films
  • Fullerenes and derivatives
  • Photoconductivity
  • Polythiophene and derivative
  • Solar cells


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