Journal article
Confined and delocalized polarons in pi-conjugated oligomers and polymers: A study of the effective conjugation length
Physical review. B, Vol.69(24), pp.1-241204
06/01/2004
DOI: 10.1103/PhysRevB.69.241204
Abstract
We studied optical absorption of polarons in pi-conjugated oligomers and polymers using the photoinduced absorption technique as well as chemical doping spectra from the literature. We find that the photon energy of the polaron low-energy transition obeys a relationship that depends only on the oligomer-length in a wide class of unsubstituted and substituted oligomer solutions and films. Based on this observation, we show that polarons in polymer films can be either confined as in oligomers or quite delocalized, depending on the individual pi-conjugated semiconductor. In high mobility polymer films polarons may be delocalized over several chains.
Details
- Title: Subtitle
- Confined and delocalized polarons in pi-conjugated oligomers and polymers: A study of the effective conjugation length
- Creators
- M Wohlgenannt - University of IowaX M JiangZ V Vardeny - University of Utah
- Resource Type
- Journal article
- Publication Details
- Physical review. B, Vol.69(24), pp.1-241204
- Publisher
- Amer Physical Soc
- DOI
- 10.1103/PhysRevB.69.241204
- ISSN
- 2469-9950
- eISSN
- 2469-9969
- Number of pages
- 4
- Language
- English
- Date published
- 06/01/2004
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428811002771
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