Journal article
Ultrafast spectroscopy of even-parity states in pi-conjugated polymers
Physical review letters, Vol.85(10), pp.2196-2199
09/04/2000
DOI: 10.1103/PhysRevLett.85.2196
PMID: 10970496
Abstract
Relaxation dynamics of even parity (A,) states in poly(p-phenylene vinylene) derivatives are studied using a novel fsec transient spectroscopy, in which two different excitation pulses successively generate odd parity (1 B-1(u)) excitons at 2.2 eV and then reexcite them to higher A(g) states. For reexcitation energies h omega < 1.1 eV ultrafast internal conversion hack to 1(1)B(u) takes place in accordance with Vavilov-Kasha's rule. However, for h omega > 1.1 eV the decay occurs in a nonemissive state identified as a polaron pair, showing that the A, states above 3.3 eV mediate charge transfer.
Details
- Title: Subtitle
- Ultrafast spectroscopy of even-parity states in pi-conjugated polymers
- Creators
- S V Frolov - Alcatel-LucentZ Bao - Alcatel-LucentM Wohlgenannt - University of UtahZ V Vardeny - University of Utah
- Resource Type
- Journal article
- Publication Details
- Physical review letters, Vol.85(10), pp.2196-2199
- Publisher
- AMERICAN PHYSICAL SOC
- DOI
- 10.1103/PhysRevLett.85.2196
- PMID
- 10970496
- ISSN
- 0031-9007
- eISSN
- 1079-7114
- Number of pages
- 4
- Language
- English
- Date published
- 09/04/2000
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428666402771
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