A novel orange-red thermally activated delayed fluorescence emitter with high molecular rigidity and planarity realizing 32.5% external quantum efficiency in organic light-emitting diodes
Hengyuan Zhang, Haoyu Yang, Ming Zhang, Hui Lin, Silu Tao, Caijun Zheng, Xiaohong Zhang
Abstract
With high molecular rigidity and planarity, the orange-red emitter SAF-2NP realized Φ PL and Θ ‖ of 99% and 85%, respectively. The optimal device demonstrated a maximum external quantum efficiency of 32.5% with an emission peak of 576 nm.
Topics & Concepts
Planarity testingMaterials scienceOLEDCommon emitterQuantum efficiencyFluorescenceOptoelectronicsOrange (colour)Rigidity (electromagnetism)DiodeQuantumPhotochemistryOpticsNanotechnologyChemistryCrystallographyPhysicsComposite materialLayer (electronics)Quantum mechanicsOrganic Light-Emitting Diodes ResearchOrganic Electronics and PhotovoltaicsLuminescence and Fluorescent Materials