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Title: Manipulation of the electroluminescence of organic light-emitting diodes via fringe fields from patterned magnetic domains

We predict very large changes in the room-temperature electroluminescence of thermally-activated delayed fluorescence organic light emitting diodes near patterned ferromagnetic films. These effects exceed the changes in a uniform magnetic field by as much as a factor of two. We describe optimal ferromagnetic film patterns for enhancing the electroluminescence. A full theory of the spin-mixing processes in exciplex recombination and how they are affected by hyperfine fields, spin-orbit effects, and ferromagnetic fringe field effects is introduced. These spin-mixing processes are used to describe the effect of magnetic domain structures on the luminescence in various regimes. This provides a method of enhancing light emission rates from exciplexes and also a means of efficiently coupling information encoded in the magnetic domains to organic light emitting diode emission
Authors:
 [1] ;  [1] ;  [2]
  1. Univ. of Iowa, Iowa City, IA (United States)
  2. Univ. of Iowa, Iowa City, IA (United States); Eindhoven Univ. of Technology (Netherlands)
Publication Date:
Grant/Contract Number:
SC0014336
Type:
Published Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 24; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Iowa, Iowa City, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
OSTI Identifier:
1337587
Alternate Identifier(s):
OSTI ID: 1336501; OSTI ID: 1425743

Harmon, N. J., Wohlgenannt, M., and Flatté, M. E.. Manipulation of the electroluminescence of organic light-emitting diodes via fringe fields from patterned magnetic domains. United States: N. p., Web. doi:10.1063/1.4971332.
Harmon, N. J., Wohlgenannt, M., & Flatté, M. E.. Manipulation of the electroluminescence of organic light-emitting diodes via fringe fields from patterned magnetic domains. United States. doi:10.1063/1.4971332.
Harmon, N. J., Wohlgenannt, M., and Flatté, M. E.. 2016. "Manipulation of the electroluminescence of organic light-emitting diodes via fringe fields from patterned magnetic domains". United States. doi:10.1063/1.4971332.
@article{osti_1337587,
title = {Manipulation of the electroluminescence of organic light-emitting diodes via fringe fields from patterned magnetic domains},
author = {Harmon, N. J. and Wohlgenannt, M. and Flatté, M. E.},
abstractNote = {We predict very large changes in the room-temperature electroluminescence of thermally-activated delayed fluorescence organic light emitting diodes near patterned ferromagnetic films. These effects exceed the changes in a uniform magnetic field by as much as a factor of two. We describe optimal ferromagnetic film patterns for enhancing the electroluminescence. A full theory of the spin-mixing processes in exciplex recombination and how they are affected by hyperfine fields, spin-orbit effects, and ferromagnetic fringe field effects is introduced. These spin-mixing processes are used to describe the effect of magnetic domain structures on the luminescence in various regimes. This provides a method of enhancing light emission rates from exciplexes and also a means of efficiently coupling information encoded in the magnetic domains to organic light emitting diode emission},
doi = {10.1063/1.4971332},
journal = {Applied Physics Letters},
number = 24,
volume = 109,
place = {United States},
year = {2016},
month = {12}
}