Influence of dopant on the electronic structure of spiro-oligophenyl-based disordered organic semiconductors

A. Crispin*, X. Crispin, M. Fahlman, D. A. Dos Santos, J. Cornil, N. Johansson, J. Bauer, F. Weissörtel, J. Salbeck, Jean-Luc Bredas, W. R. Salaneck

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The influence of the dopant on the electronic structure of spiro-oligophenyl-based disordered organic semiconductors was studied by means of photoelectron spectroscopy. With lithium atoms as dopants, two charges were stored on the same spiro branch in the form of bipolarons, for spiro-quarterphenyl and spiro-sexiphenyl. For doping with the sodium atoms, the size of the counter ions made it less energetically desirable to store two charges onto a single branch, and the charged species were polarons independent of the level of doping which was confirmed by optical absorption data.

Original languageEnglish (US)
Pages (from-to)8159-8167
Number of pages9
JournalJournal of Chemical Physics
Volume116
Issue number18
DOIs
StatePublished - May 8 2002

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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