Organic heterojunction photovoltaic cells made of discotic, mesogenic materials

T. Haßheider, S. A. Benning, M. W. Lauhof, H. S. Kitzerow, H. Bock, M. D. Watson, K. Müllen

Research output: Contribution to journalConference articlepeer-review

20 Scopus citations

Abstract

We made photovoltaic cells containing two organic layers. The hole-conducting layer consists of a hexa-peri-hexabenzocoronene (HBC) derivative. The electron-conducting component is an alkylester of perylene tetracarboxylic acid. Both compounds form columnar mesophases which can provide 1D pathways for transport. The current/voltage-characteristics of the two-layer devices indicate a photovoltaic effect with an open circuit voltage of V oc ≈ 0.8V, a short circuit current of Isc ≈ 3.9 μA/cm2, and a filling factor of FF ≤ 31%. The spectral distribution of the photocurrent of different samples indicates that excitations of the perylene derivative or of the HBC derivative both can lead to a photovoltaic effect.

Original languageEnglish
Pages (from-to)461/[2597]-472/[2608]
JournalMolecular Crystals and Liquid Crystals
Volume413
DOIs
StatePublished - 2004
EventProceedings of the 19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom
Duration: Jun 30 2002Jul 5 2002

Keywords

  • Columnar liquid crystals
  • Discotic
  • Photovoltaic cells

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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