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Rare Earth Complex as a High-Efficiency Emitter in an Electroluminescent Device
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2001
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High-efficiency EmitterOptical MaterialsEngineeringElectroluminescent DeviceInherent ElectroluminescenceChemistryLuminescence PropertyEl EfficiencyChemical EngineeringPhosphorescence ImagingOptical PropertiesRare Earth ComplexPhotonicsElectrical EngineeringInorganic ChemistryPhotoluminescencePhysicsOptoelectronic MaterialsNew Lighting TechnologyTraditional Fluorescent MaterialsWhite OledSolid-state LightingNatural SciencesApplied PhysicsOptoelectronicsPhosphorescence
A red-light emitting europium complex(see Figure) is investigated here as an alternative to traditional fluorescent materials, which have an inherent electroluminescence (EL) efficiency limited to 25 % of their photoluminescence (PL) efficiency. It is shown that by optimizing the structure of Eu complex–based devices significant improvements in the EL efficiency and stability can be obtained.