Electroluminescence and photovoltaic effects using columnar mesogenic compounds

Thomas Haßheider, Stephan A. Benning, Marcus W. Lauhof, Reinhold Oesterhaus, Sonia Alibert-Fouet, Harald Bock, John W. Goodby, Mark Watson, Klaus Müllen, Heinz Siegfried Kitzerow

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


Columnar liquid crystals are useful for the construction of organic light emitting diodes (OLED) due to their high charge carrier mobility and their ability of developing defect-free superstructures. We investigated the electroluminescent properties of various mesogenic derivatives of triphenylene, pyrene, perylene, benzoperylene and hexa-peri-hexabenzocoronene (HBC) which combine good charge carrying properties and luminescence. The wavelengths of maximum electroluminescence range from about 400 nm to 720 nm, depending on the core and the substitution of the molecules. Nearly white emission can be obtained in samples containing two or more emitting layers. The perylene core is so efficient that even a single organic layer between an ITO anode and an aluminum cathode can give luminance values up to 100 cd/m2. In addition to the electroluminescence, we present results on the photovoltaics in hetero junction structures of the compounds. Samples with two organic layers made of a HBC- and a perylene derivative show an open circuit voltage Voc of about 0.8 V, a short circuit current Isc of a few μA/cm2, and a filling factor FF of approximately 31%.

Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2003
EventLiquid Crystal Materials, Devices, and Applications IX - Santa Clara, CA, United States
Duration: Jan 21 2003Jan 22 2003


  • Columnar liquid crystals
  • Electroluminescence
  • Organic light emitting diodes
  • Photovoltaics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Electroluminescence and photovoltaic effects using columnar mesogenic compounds'. Together they form a unique fingerprint.

Cite this