liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
On the role of minority carriers in the frequency dependence of organic magnetoresistance
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
Show others and affiliations
2011 (English)In: Synthetic metals, ISSN 0379-6779, Vol. 161, no 7-8, 617-621 p.Article in journal (Refereed) Published
Abstract [en]

In this work we investigate the frequency dependence of organic magnetoresistance (OMAR) both in small molecule-based (Alq3) and polymer (PPV derivative) materials, and investigate its thickness dependence. For all devices, we observed a strong decrease in magnetoconductance (MC) with increasing frequency of the ac component of the applied magnetic field. Moreover, we observed a strong reduction of the cut-off frequencies for increasing film thickness. By means of admittance spectroscopy and device simulations, we show that the cut-off frequency is related to the inverse transit time of the minority charge carriers. These observations confirm the important role of minority carriers in OMAR, and show that changes in OMAR are not only due to microscopic mechanisms, but also device physics is of significant relevance.

Place, publisher, year, edition, pages
Elsevier , 2011. Vol. 161, no 7-8, 617-621 p.
Keyword [en]
Organic semiconductor; Magnetoresistance; Carrier mobility; Minority carriers; Transit time
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-118163DOI: 10.1016/j.synthmet.2011.01.013ISI: 000290424900014OAI: oai:DiVA.org:liu-118163DiVA: diva2:813691
Conference
3rd International Meeting on Spins in Organic Semiconductors (SPINOS III)
Available from: 2015-05-25 Created: 2015-05-22 Last updated: 2015-06-01

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kemerink, Martijn
By organisation
Chemical and Optical Sensor SystemsThe Institute of Technology
In the same journal
Synthetic metals
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 29 hits
ReferencesLink to record
Permanent link

Direct link