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Correspondence of the sign change in organic magnetoresistance with the onset of bipolar charge transport
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.ORCID iD: 0000-0002-7104-7127
Eindhoven University of Technology, Netherlands.
2008 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 93, no 26, 263302Article in journal (Refereed) Published
Abstract [en]

In this work we examine the transition between positive and negative organic magnetoresistance in poly[2-methoxy-5-(3(), 7()-dimethyloctyloxy)-p-phenylenevinylene] in order to understand how different regimes of charge transport affect the organic magnetoresistance effect. To characterize the charge transport in these devices we measured the current, low frequency differential capacitance, and electroluminescence efficiency as a function of voltage. These measurements show that the sign change of the magnetoresistance corresponds with a change from a unipolar diffusive transport below the built in voltage (V(bi)) to a regime of bipolar drift transport above V(bi).

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2008. Vol. 93, no 26, 263302
Keyword [en]
charge exchange; electroluminescence; magnetoresistance; organic semiconductors
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-141490DOI: 10.1063/1.3059555ISI: 000262225700064OAI: oai:DiVA.org:liu-141490DiVA: diva2:1145681
Note

Funding Agencies|Dutch Technology foundation

Available from: 2017-09-29 Created: 2017-09-29 Last updated: 2017-10-06

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