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Highly efficient and stable pure blue nondoped organic light-emitting diodes at high luminance based on phenanthroimidazole-pyrene derivative enabled by triplei-triplet annihilation

White OledEngineeringPhotochemistryOrganic ElectronicsApplied PhysicsNew Lighting TechnologyTriplei-triplet AnnihilationOrganic ChemistryLight-emitting DiodesStable Pure BlueChemistryLuminescence PropertyThermally Activated Delayed FluorescenceOptoelectronicsHigh Luminance