Journal article
Magnetoconductivity and magnetoluminescence studies in bipolar and almost hole-only sandwich devices made from films of a π-conjugated molecule
Science and technology of advanced materials, Vol.9(2), pp.024206-024206
04/01/2008
DOI: 10.1088/1468-6996/9/2/024206
PMCID: PMC5099714
PMID: 27877957
Abstract
We present magnetoconductivity and magnetoluminescence measurements in sandwich devices made from films of a π-conjugated molecule and demonstrate effects of more than 30 and 50% magnitude, respectively, in fields of 100 mT at room-temperature. It has previously been recognized that the effect is caused by hyperfine coupling, and that it is phenomenologically similar to other magnetic field effects that act on electron-hole pairs, which are well-known in spin-chemistry. However, we show that the very large magnitude of the effect contradicts present knowledge of the electron-hole pair recombination processes in electroluminescent π-conjugated molecules, and that the effect persists even in almost hole-only devices. Therefore, this effect is likely caused by the interaction of radical pairs of equal charge.
Details
- Title: Subtitle
- Magnetoconductivity and magnetoluminescence studies in bipolar and almost hole-only sandwich devices made from films of a π-conjugated molecule
- Creators
- Tho Duc Nguyen - Department of Physics and Astronomy and Optical Science and Technology CenterYugang Sheng - University of IowaJames E Rybicki - University of IowaMarkus Wohlgenannt - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Science and technology of advanced materials, Vol.9(2), pp.024206-024206
- Publisher
- Taylor & Francis
- DOI
- 10.1088/1468-6996/9/2/024206
- PMID
- 27877957
- PMCID
- PMC5099714
- ISSN
- 1468-6996
- eISSN
- 1878-5514
- Language
- English
- Date published
- 04/01/2008
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428780302771
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