Delocalized polarons in self-assembled poly(3-hexyl thiophene) nanocrystals

R. Österbacka*, C. P. An, X. M. Jiang, Z. V. Vardeny

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

39 Citations (Scopus)

Abstract

We have studied the characteristic properties of charged excitations (polarons) in thin films of regioregular poly(3-hexylthiophene) (RRPHT) by optical spectroscopies. We found that the increased interchain coupling that exists in self-assembled lamellae in these films drastically changes the properties of the polaron excitations. The traditional self-localized polaron in one-dimension delocalizes in two-dimensions, resulting in a much-reduced relaxation energy and multiple absorption bands, the most dominant being in the mid-infrared (IR) spectral range. Also it has associated IR and Raman active vibrations with reverse absorption bands [anti-resonances (AR)] compared with the continuum electronic band. The AR are attributed to the electron-phonon interaction.

Original languageEnglish
Pages (from-to)317-320
Number of pages4
JournalSynthetic Metals
Volume116
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 2001
MoE publication typeA1 Journal article-refereed

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