Applied Physics Letters · 2008 · 56 citations · 22 references
EngineeringOrganic ElectronicsIncreased LightChemistryChemical EngineeringOptical PropertiesLight-emitting DiodesWaveguide AbsorptionPhotonicsOrganic SemiconductorNew Lighting TechnologyOrganic Light-emitting DiodesWhite OledSolid-state LightingNanoimprinted Low-refractive-index LayerSemiconducting PolymerApplied PhysicsConjugated PolymerNormal DirectionOptoelectronics
The authors have demonstrated increased light outcoupling from organic light-emitting diodes (OLEDs) based on nanoimprinted amorphous fluoropolymer, poly[perfluoro(4-vinyloxy-l-butene)] (PPFVB). Because PPFVB has a low refractive index and a high transmittance over wide wavelength range, the first-order Bragg diffracted light shows high directionality and decreased waveguide absorption. These characteristics provide an advantage for small- or medium-sized OLEDs, which are mainly viewed from the normal direction.
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