Optical Materials Express · 2016 · 15 citations · 18 references
EngineeringMaterials EngineeringMaterials ScienceElectronic MaterialsOptical MaterialsOptoelectronicsColor RenderingDisplay TechnologiesHuman-centric LightingLight-emitting DiodesLuminescent MaterialsOrganic SemiconductorsApplied Voltage OptimizationBlack-body RadiationCarrier MobilityCarrier Transport MechanismsCarrier Transport ModelingCarrier-mediated TransportOrganic ElectronicsOrganic Light-emitting Diodes
We report the design and fabrication of a single-cell organic light-emitting diode (OLED) whose emission color shifts inline with the broad black-body radiation and the tunability is controlled by applied voltage. Correlated color temperature (CCT) shift from 2500K to 15000K was intrinsically aroused from carrier mobility change in organic layers. The multi-layer OLED design was optimized by calculation of carrier transport and recombination zone location. Emphasis was made on both color and efficiency. Devices reported here can reach consistently high color rendering index (CRI) 94-97 in broad color range from orange to blue, revealing potential in human centric lighting applications.
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