Magnetic field effects on the conductivity of organic bipolar and unipolar devices at room temperature
Gómez, J. A.; Nüesch, F.; Zuppiroli, L.; Greaff, C. F. O.
2010

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Abstract

Magnetic field effects on the conductivity of different types of organic devices: undoped and dye doped aluminium (III) 8-hydroxyquinoline (Alq3)-based organic light emitting diodes (OLEDs), electrononly Alq3-based diodes, and a hole-only N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (a-NPD)-based diode were studied at room temperature. Only negative magnetoresistance (MR) was observed for the Alq3-based devices. The addition of a rubrene dye in Alq3-based OLEDs quenches the MR by a factor of 5. The a-NPD hole-only device showed only positive MR. Our results are discussed with respect to the actual models for MR in organic semiconductors. Our results are in good agreement with the bipolaron model.

Details

Title Magnetic field effects on the conductivity of organic bipolar and unipolar devices at room temperature
Author(s) Gómez, J. A. ; Nüesch, F. ; Zuppiroli, L. ; Greaff, C. F. O.
Published in Synthetic Metals
Volume 160
Pages 317-319
Date 2010
Publisher Elsevier
ISSN 0379-6779
Keywords
DOI https://doi.org/10.1016/j.synthmet.2009.11.020
Other identifier(s) View record in Web of Science
Laboratories LOMM
Record Appears in Scientific production and competences > STI - School of Engineering > STI Archives > LOMM - Laboratory of Optoelectronics of Molecular Materials
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2011-12-21

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