Applied Physics Letters · 2000 · 321 citations · 8 references
EngineeringElectrical EngineeringMaterials ScienceOptical MaterialsOptoelectronicsPhotonicsLight SourcesLight-emitting DiodesOptoelectronic DevicesOptoelectronic MaterialsOrganic Electronic MaterialsOrganic SemiconductorsLaminated FilmsLight-emitting DevicesOrganic ElectronicsOrganic Light-emitting DiodesSubstrate AdhesionTotal Efficiency
The emission intensity of an organic light-emitting diode at normal viewing angle and the total external emission efficiency have been increased by factors of 9.6 and 3.0, respectively, by applying spherically shaped patterns to the back of the device substrate. The technique captures light previously lost to waveguiding in the substrate and, with proper choice of substrate, light previously lost to waveguiding in the organic/anode layers. A method of applying the technique using laminated films and an optical model for evaluating coupling efficiency are also presented.
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Weak microcavity effects in organic light-emitting devices
Vladimir Bulović, V. Khalfin, G. Gu et al. · Physical review. B, Condensed matter · 1998 · 500 citations
Natural Sciences, Electrical Engineering, Materials Science +17
High-external-quantum-efficiency organic light-emitting devices
G. Gu, D.Z. Garbuzov, P. E. Burrows et al. · Optics Letters · 1997 · 343 citations