Applied Physics Letters · 2008 · 58 citations · 11 references
Natural SciencesChemistryMaterials ScienceOptical MaterialsOptoelectronicsSemiconductor MaterialsLight-emitting DiodesLuminescent MaterialsOptoelectronic DevicesOptoelectronic MaterialsOrganic Electronic MaterialsOrganic SemiconductorsGreen Light-emitting DiodesHole TransportInternal Quantum EfficiencyLuminanceOrganic Light-emitting DiodesOrganic Light-emitting MaterialsPhosphorescent MaterialsQuantum Efficiency
Highly efficient green phosphorescent organic light-emitting diodes were developed by using high triplet energy hole transport materials. The quantum efficiency of green devices could be improved from 12% to 20% at 1000cd∕m2 by using a phenylcarbazole based hole transport material. In addition, the high quantum efficiency could be stably maintained up to a high luminance of 10000cd∕m2.
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