Conference proceeding
The effect of fringe fields from patterned magnetic domains on the electroluminescence of organic light-emitting diodes
Proceedings of SPIE - The International Society for Optical Engineering, Vol.9931, pp.993102-993102-9
10/03/2016
DOI: 10.1117/12.2242838
Abstract
Large magnetic field effects, either in conduction or luminescence, have been observed in organic light-emitting diodes (OLEDs) for over a decade now. The physical processes are largely understood when exciton formation and recombination lead to the magnetic field effects. Recently, magnetic field effects in some co-evaporated blends have shown that exciplexes deliver even larger responses. In either case, the magnetic field effects arise from some spin-mixing mechanism and spin-selective processes in either the exciton formation or the exciplex recombination. Precise control of light output is not possible when the spin mixing is either due to hyper-fine fields or differences in the Lande g-factor. We theoretically examine the optical output when a patterned magnetic film is deposited near the OLED. The fringe fields from the magnetic layers supply an additionally source of spin mixing that can be easily controlled. In the absence of other spin mixing mechanisms, the luminescence from exciplexes can be modified by 300%. When other spin-mixing mechanisms are present, fringe fields from remanent magnetic states act as a means to either boost or reduce light emission from those mechanisms. Lastly, we examine the influence of spin decoherence on the optical output.
Details
- Title: Subtitle
- The effect of fringe fields from patterned magnetic domains on the electroluminescence of organic light-emitting diodes
- Creators
- Nicholas J Harmon - University of IowaMarkus Wohlgennant - University of IowaMichael E Flatté - University of Iowa
- Contributors
- Henri-Jean Drouhin (Editor) - École PolytechniqueJean-Eric Wegrowe (Editor) - École PolytechniqueManijeh Razeghi (Editor) - Northwestern University
- Resource Type
- Conference proceeding
- Publication Details
- Proceedings of SPIE - The International Society for Optical Engineering, Vol.9931, pp.993102-993102-9
- Publisher
- SPIE
- DOI
- 10.1117/12.2242838
- ISSN
- 0277-786X
- eISSN
- 1996-756X
- Language
- English
- Date published
- 10/03/2016
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984429035702771
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