C1-, C2-, and C3-Modified Carbazole Derivatives as Promising Host Materials for Phosphorescent Organic Light-Emitting Diodes
Rajendra Kumar Konidena, Won Jae Chung, Jun Yeob Lee
Abstract
Herein we unveiled the synthetic approach to C1-, C2-, and C3-modified carbazoles for the first time and designed high-triplet-energy bipolar host materials for green phosphorescent organic light-emitting devices. The compounds revealed excellent performance with a maximum external quantum efficiency as high as 23.6% and extremely low-efficiency roll-off of 2.1% at high brightness of 1000 cd/m2.
Topics & Concepts
PhosphorescenceCarbazoleOLEDBrightnessChemistryQuantum efficiencyOptoelectronicsDiodeHost (biology)Phosphorescent organic light-emitting diodePhotochemistryMaterials scienceFluorescenceOrganic chemistryOpticsPhysicsEcologyBiologyLayer (electronics)Organic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsOrganic Electronics and Photovoltaics