Texturing the cathode of white organic light-emitting diodes with a lattice of nanoscale scatterers for enhanced light out-coupling

Journal Article · Mon Jan 26 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4907253· OSTI ID:22415172

Oskooi, Ardavan ^[1]

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1. Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109 (United States)

The external quantum efficiency of white organic light-emitting diodes is often limited by light out-coupling losses due to surface plasmons. We demonstrate how texturing of the metal-cathode surface using a two-dimensionally periodic lattice of nanoscale scatterers with limited disorder can be used to reduce plasmonic losses while simultaneously enhancing both the light out-coupling and the spontaneous-emission rate of the excitons. We use electrodynamic simulations and statistical modeling to explore the relationship between the topology of the surface texture and its corresponding scattering efficiency. From this, we outline attributes of textures that can most enhance device performance.

• OSTI ID: 22415172
• Journal Information: Applied Physics Letters, Vol. 106, Issue 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATHODES
EXCITONS
LIGHT EMITTING DIODES
NANOSTRUCTURES
PLASMONS
QUANTUM EFFICIENCY
SIMULATION