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High external quantum efficiency and low efficiency roll-off achieved simultaneously in nondoped pure-blue organic light-emitting diodes based on a hot-exciton fluorescent material

Organic Charge-transfer CompoundWhite OledHot-exciton Fluorescent MaterialEngineeringPhotochemistryOrganic ElectronicsApplied PhysicsLight-emitting DiodesLow Efficiency Roll-offChemistryLuminescence PropertyThermally Activated Delayed FluorescenceOptoelectronics