Exciton dissociation in poly-phenylene-vinylene derivative:perylenediimide and hexabenzocoronene derivative:perylenediimide blend systems

C. Im, W. Tian, H. Bässler, A. Fechtenkötter, M. D. Watson, K. Müllen

Research output: Contribution to journalConference articlepeer-review

10 Scopus citations


Steady state photoconduction both in a phenyl-substituted copolymeric poly-phenylene-vinylene (PhPPV) and in alkylated hexa-peri-hexabenzocoronene (HBC) doped by perylenediimide (PdI) at a broad range of dopant concentrations has been measured and compared to previous results [J. Chem. Phys. 117 (2002) 1395] on PhPPV doped by trinitrofluorenone (TNF). At relatively small concentration (<10wt.%), the yield of the photogeneration is almost independent of the system and blend ratio because practically every primary excitation dissociates at a donor-acceptor site and the subsequent escape from the coulombic potential is virtually system-independent. At dopant concentrations >10wt.%, the yield of that escape process increases by approximately two orders of magnitude explained by both shielding of the pair potential and the onset of percolative electron motion across the acceptor network.

Original languageEnglish
Pages (from-to)683-686
Number of pages4
JournalSynthetic Metals
Issue number3
StatePublished - Oct 9 2003
EventProceedings of the Fifth International Topical Conference - Venice, Italy
Duration: Feb 9 2003Feb 14 2003

Bibliographical note

Funding Information:
PhPPV was kindly provided by Covion Organic Semiconductor Co., Germany. Discussions with V.I. Arkhipov are gratefully acknowledged. This work was supported by the OPTODYNAMIK center of the university of Marburg, Germany and the Fond der Chemischen Industrie. WT acknowledges financial support by the National Science Foundation of China (no. 20074013).


  • Exciton dissociation
  • Organic optoelectronics
  • Photoconductivity
  • Photovoltaic device
  • Semiconducting polymer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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