Absorption Spectroscopy of Charged Excitations in ..alpha..-Sexithiophene: Evidence for Charge Conjugation Symmetry Breaking

P. A. Lane, X. Wei, Z. V. Vardeny, J. Poplawski, E. Ehrenfreund, M. Ibrahim, A. J. Frank

Research output: Contribution to journalArticlepeer-review

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Abstract

We have studied the absorption spectra of charged excitations in sexithiophene thin films induced by doping and photogeneration. Absorption bands at 0.80 and 1.54 eV are attributed to spin-1/2 polarons, whereas a single absorption band at 1.1 eV is due to spinless bipolarons. Charge conjugation symmetry breaking is evident for both polarons and bipolarons.

Original languageAmerican English
Pages (from-to)229-234
Number of pages6
JournalChemical Physics
Volume210
Issue number1-2 SPEC. ISS.
DOIs
StatePublished - 1996

NREL Publication Number

  • NREL/JA-450-22323

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