Applied Physics Letters · 1997 · 131 citations · 7 references
EngineeringElectrical EngineeringMaterials ScienceOpticsOptoelectronicsPhotonicsLight SourcesLight-emitting DiodesOptical SourcesOptoelectronic DevicesPhotonic Integrated CircuitsPhotonic MaterialsCurrent DensityExternal Quantum EfficiencyLight-emitting DevicesMicro-ledsQuantum EfficiencySpectral Line Broadening
Results are presented on planar microcavity light emitting diodes with different device diameters. A record external quantum efficiency of 20% is achieved for a 1.5 mm light emitting diode. The strong dependence of the quantum efficiency on current density and device size are compared with theoretical results. A good correspondence is obtained when spectral broadening and photon recycling are taken into account.
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