Journal article
Magnetic field effects on current, electroluminescence and photocurrent in organic light-emitting diodes
Journal of physics. Condensed matter, Vol.19(3), pp.036209-036209 (13)
01/24/2007
DOI: 10.1088/0953-8984/19/3/036209
Abstract
We report on the experimental characterization of a recently discovered large magnetoresistive effect in polyfluorene and in Alq3 organic light-emitting diodes. We also observe similar magnetic field effects (MFEs) of comparable magnitude in electroluminescence and photocurrent measurements. We provide a comprehensive overview of all these three types of MFE. To the best of our knowledge, the mechanism causing these MFEs is not currently known with certainty. Moreover, we show that experiments in bipolar, electroluminescent devices do not allow determination of whether the MFE acts on the carrier density or carrier mobility, making any attempt at explaining it ambiguous. As a remedy, we perform magnetoresistance measurements in hole-only polyfluorene devices and show that the MFE acts on the carrier mobility rather than carrier recombination. © IOP Publishing Ltd.
Details
- Title: Subtitle
- Magnetic field effects on current, electroluminescence and photocurrent in organic light-emitting diodes
- Creators
- G Veeraraghavan - University of IowaT. D Nguyen - University of IowaY Sheng - Department of Physics and Astronomy and Optical Science and Technology Center, University of Iowa, Iowa City, IA 52242-1595, United StatesO Mermer - University of IowaM Wohlgenannt - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of physics. Condensed matter, Vol.19(3), pp.036209-036209 (13)
- Publisher
- Institute of Physics
- DOI
- 10.1088/0953-8984/19/3/036209
- ISSN
- 0953-8984
- eISSN
- 1361-648X
- Language
- English
- Date published
- 01/24/2007
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428828402771
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