Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Physics |
Creator |
Vardeny, Zeev Valentine |
Other Author |
Wang, F. J.; Bassler, Heinz |
Title |
Magnetic field effects in ∏-conjugated polymer-fullerene blends: evidence for multiple components |
Date |
2008-12 |
Description |
We studied magnetoconductance (MC) and magnetoelectroluminescence (MEL) in organic diodes from blends of ∏-conjugated polymers and fullerenes at various concentrations, c. The MC response is composed of several components that depend on the applied bias voltage and c. A dominant positive low-field (LF) component, which also governs the MEL response, dramatically decreases and broadens in the blends, thus unraveling a positive high-field and negative LF components. The positive MC components are caused by electrostatically bound e-h polaron pairs in unblended devices, and charge transfer pairs in the blends, which are dominated by two different field-induced spin sublevel mixing mechanisms. In contrast, the negative LF response is due to e-e and h-h pairs; this is confirmed by studying MC in electron- and hole-unipolar devices, which lack positive MC response. |
Type |
Text |
Publisher |
American Physical Society |
Journal Title |
Physical Review Letters |
Volume |
101 |
Issue |
23 |
First Page |
236805 |
Last Page |
236801 |
DOI |
10.1103/PhysRevLett.101.236805 |
citatation_issn |
0031-9007 |
Subject |
pi-conjugated polymers; Fullerene blends; Magnetic field effects; Magnetoconductance; Magnetoelectroluminescence; MC; MEL; Organic magnetoresistance; OMAR; Organic diodes |
Subject LCSH |
Magnetic fields; Magnetoresistance; Conjugated polymers -- Optical properties; Fullerenes -- Optical properties; Conjugated polymers -- Magnetic properties; Fullerenes -- Magnetic properties |
Language |
eng |
Bibliographic Citation |
Wang, F. J., Bassler, H., & Vardeny, Z. V. (2008). Magnetic field effects in ∏-conjugated polymer-fullerene blends: evidence for multiple components. Physical Review Letters, 101(23), 236805-1-4. |
Rights Management |
(c) American Physical Society http://dx.doi.org/10.1103/PhysRevLett.101.236805 |
Format Medium |
application/pdf |
Format Extent |
250,787 bytes |
Identifier |
ir-main,10125 |
ARK |
ark:/87278/s63j3x99 |
Setname |
ir_uspace |
ID |
704783 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s63j3x99 |