Applied Physics Letters · 2007 · 54 citations · 22 references
EngineeringElectrical EngineeringMaterials ScienceOptoelectronicsSemiconductor DevicesSemiconductor MaterialsOptoelectronic DevicesPhotovoltaic DevicesQuantum Well DevicesQuantum WellsSolar Cell MaterialsSolar CellsCurrentsElectroluminescencePhotoluminescence In Quantum WellsQuantum Well Solar CellsQuantum Well StructuresSolar Cell CharacterizationStrain EffectsStrained Quantum Wells
Photon recycling in strain-balanced quantum well solar cells grown on distributed Bragg reflectors has been observed as a suppression of the dark current and a change in electroluminescence spectra. Comparing devices grown with and without distributed Bragg reflectors we have demonstrated up to a 33% reduction in the ideality n=1 reverse saturation current. Furthermore, to validate the observations we demonstrate how both the measured dark currents and electroluminescence spectra fit very well to a photon recycling model. Verifying our observations with the model then allows us to calculate optimized device designs.
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Resonant cavity light-emitting diode
E. F. Schubert, Y.-H. Wang, A. Y. Cho et al. · Applied Physics Letters · 1992 · 357 citations