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Bipolar Host Materials for Green Triplet Emitter in Organic Light-emitting Diodes
18
Citations
9
References
2007
Year
EngineeringOrganic ElectronicsGreen ChemistryOrganic ChemistryGreen PholedsChemistryGreen Triplet EmitterChemical EngineeringElectronic DevicesLight-emitting DiodesHybrid MaterialsThermally Activated Delayed FluorescenceOrganic SemiconductorBipolar Host MaterialsOptoelectronicsOrganic Light-emitting DiodesOrganic Charge-transfer CompoundWhite OledSolid-state LightingElectronic MaterialsApplied PhysicsPhenyl MoietiesConstant LuminanceFunctional Materials
Abstract We have developed novel bipolar host materials for high efficiency green phosphorescent OLEDs (PHOLEDs). Phenyl moieties were inserted in a 9,9′-(biphenyl-4,4′-diyl)dicarbazole (CBP) compound to provide much easier electron injection and to increase electron mobility. The efficiency increase and voltage reduction by this modification were observed in green PHOLEDs. At a given constant luminance of 1000 cd/m2, the power efficiency was enhanced about twenty percent in the general green PHOLED devices.
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