Electroluminescence- and electrically-detected magnetic resonance studies of spin one-half-polaron and singlet-exciton dynamics in multilayer small molecular organic light-emitting devices

Gang Li,Joseph Shinar

doi:10.1117/12.457465

Electroluminescence- and electrically-detected magnetic resonance studies of spin one-half-polaron and singlet-exciton dynamics in multilayer small molecular organic light-emitting devices

Gang Li, Joseph Shinar

https://doi.org/10.1117/12.457465

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Publication Date: Feb 27, 2002

Citations: 2

Affiliation: United States Department of Energy, Iowa State University

#Small Molecular Organic Light-emitting Devices #Electrically-detected Magnetic Resonance + Show 8 more

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Abstract

The electroluminescence (EL)- and electrically-detected magnetic resonance (ELDMR and EDMR, respectively) of tris- (8-hydroxyquinoline) Al (Alq 3 )]/[buffer]/Al-based organic light-emitting devices (OLEDs) are described. Positive spin ½ ELDMR and EDMR observed at T =60 K. Its amplitude increases with T, and it is much stronger in devices with an AlO x buffer layer than in those with a CsF buffer. Its behavior is consistent with magnetic resonance enhancement of the spin-dependent formation of dianions at the organic/cathode interface.

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