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White Light Emission from Organic LEDs Utilizing Spiro Compounds with High-Temperature Stability
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2000
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Optical MaterialsEngineeringHole TransportOptoelectronic DevicesChemistryWhite Light EmissionHigh-temperature StabilityLuminescence PropertyChemical EngineeringElectronic DevicesPhosphorescence ImagingOptical PropertiesHigh Morphological StabilityLight-emitting DiodesRubrene-doped Organic LedsPhotochemistryPhotonic MaterialsOptoelectronic MaterialsNew Lighting TechnologyWhite OledSolid-state LightingElectronic MaterialsApplied PhysicsOptoelectronicsPhosphorescence
Bright white light emission in rubrene-doped organic LEDs has been demonstrated using spiro compounds—such as spiro-TAD, shown in the Figure—with high glass transition temperatures. These materials show high morphological stability for hole transport and emission of blue light, and thus still operate at temperatures well above 100 °C. The devices give a maximum luminance of 11800 cd/m2.