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Accurate optical simulation of nano-particle based internal scattering layers for light outcoupling from organic light emitting diodes

Egel, Amos; Gomard, Guillaume; Kettlitz, Siegfried W; Lemmer, Uli

Abstract (englisch): We present a numerical strategy for the accurate simulation of light extraction from organic light emitting diodes ( OLEDs ) comprising an internal nano-particle based scattering layer. On the one hand, the light emission and propagation through the OLED thin fi lm system ( including the scattering layer ) is treated by means of rigorous wave optics calculations using the T -matrix formalism. On the other hand, the propagation through the substrate is modeled in a ray optics approach. The results from the wave optics calculations enter in terms of the initial substrate radiation pattern and the bidirectional re fl ectivity distribution of the OLED stack with scattering layer. In order to correct for the truncation error due to a fi nite number of particles in the simulations, we extrapolate the results to in fi nitely extended scattering layers. As an application example, we estimate the optimal particle fi lling fraction for an internal scattering layer in a realistic OLED geometry. The presented treatment is designed to emerge from electromagnetic theory with as few additional assumptions as possible. It could thus serve as a baseline to validate faster but approximate simulation approaches.

Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1088/2040-8986/aa5523
ISSN: 2040-8978, 2040-8986, 1464-4258, 1741-3567
KITopen ID: 1000065499
HGF-Programm 43.23.04; LK 01
Erschienen in Journal of optics
Band 19
Heft 2
Seiten 025605
Bemerkung zur Veröffentlichung;
Schlagworte Organic light emitting diode, Outcoupling, T-matrix, Simulation, Scattering, Nanoparticles
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