Journal article
Spin-dependent polaron pair recombination in π-conjugated polymers: enhanced singlet exciton densities
Synthetic metals, Vol.139(3), pp.921-924
10/09/2003
DOI: 10.1016/S0379-6779(03)00332-1
Abstract
We report on an experimental study of spin-dependent exciton formation in films of π-conjugated polymers. We employed a spectroscopic/magnetic resonance technique, namely the photoinduced absorption (PA)-detected magnetic resonance technique, and showed that non-geminate recombination pairs of polarons form singlet excitons more efficiently than triplets. The experimental proof for this is achieved by detection of a resonant decrease of triplet exciton absorption and resonantly enhanced singlet photoluminescence (PL). In addition, resonantly enhanced absorption is observed which we assign to a singlet exciton precursor. Our study has important implications regarding the efficiency that can be achieved in polymer light-emitting diodes (PLEDs).
Details
- Title: Subtitle
- Spin-dependent polaron pair recombination in π-conjugated polymers: enhanced singlet exciton densities
- Creators
- M. Wohlgenannt - University of IowaX.M. Jiang - Department of Physics and Astronomy, The University of Iowa, 126 IATL, Iowa City, IA 52242-1479, USAC. Yang - University of IowaO.J. Korovyanko - University of IowaZ.V. Vardeny - University of Utah
- Resource Type
- Journal article
- Publication Details
- Synthetic metals, Vol.139(3), pp.921-924
- Publisher
- Elsevier B.V
- DOI
- 10.1016/S0379-6779(03)00332-1
- ISSN
- 0379-6779
- eISSN
- 1879-3290
- Language
- English
- Date published
- 10/09/2003
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429059602771
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