Organic Letters · 2016 · 89 citations · 24 references
Natural SciencesChemistryMaterials ScienceOptical MaterialsOptoelectronicsOrganic ChemistryLight-emitting DiodesLuminescent MaterialsOptoelectronic MaterialsOrganic Electronic MaterialsOrganic SemiconductorsBenzimidazole ChemistryCurrent EfficiencyOrganic ElectronicsOrganic Light-emitting DiodesOrganic Light-emitting MaterialsPower Conversion EfficiencyPower EfficiencyTriplet State Chemistry
The novel ambipolar hosts of o-CbzBz and o-DiCbzBz contain carbazole and benzimidazole through an ortho-connection. The orthogonal conformations cause the triplet state to be confined at the carbazole units to secure efficient energy transfer. The phosphorescent organic light-emitting diodes (PhOLEDs) show a high current efficiency, power efficiency, and low efficiency roll-off. o-DiCbzBz can be used as a host for sky-blue, green, and orange-red PhOLEDs, giving 57.5, 78.4, and 60.3 cd/A, respectively.
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Highly efficient phosphorescent emission from organic electroluminescent devices
Marc A. Baldo, D. F. O’Brien, Yujian You et al. · Nature · 1998 · 7.2K citations