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Multilayer Langmuir-Blodgett films as diffractive external 3D photonic crystal in blue OLEDs.

Abstract : Three-dimensional Langmuir-Blodgett films made of silica beads are theoretically and experimentally investigated in order to improve the relatively small efficiency of blue OLEDs. Using films made of 5 layers of beads, we fabricated OLEDs emitting at 476 nm, and measured a gain of around 40% on their external quantum efficiency. An optical model has been developed to accurately handle the fact that the organic emitting layer and the photonic extraction layer are separated by a distance greater than 1000 wavelength. The latter also permits to describe rapidly this three-dimensional optical OLED cavity, without redoing all the numerical simulations when the optical properties of the organic layers are changed (material index, thicknesses).
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https://hal.archives-ouvertes.fr/hal-01407853
Contributor : Frederic Dumur Connect in order to contact the contributor
Submitted on : Friday, January 20, 2017 - 11:30:48 AM
Last modification on : Tuesday, December 7, 2021 - 1:52:04 PM
Long-term archiving on: : Friday, April 21, 2017 - 2:14:09 PM

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Frédéric Dumur, Stéphane Reculusa, Michal Mruczkiewicz, Mathias Perrin, Laurence Vignau, et al.. Multilayer Langmuir-Blodgett films as diffractive external 3D photonic crystal in blue OLEDs.. Optics Express, Optical Society of America - OSA Publishing, 2016, 24 (24), pp.27184-27198. ⟨10.1364/OE.24.027184⟩. ⟨hal-01407853⟩

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