Intramolecular hydrogen bond – enhanced electroluminescence performance of hybridized local and charge transfer (HLCT) excited-state blue-emissive materials
Wan Li, Pongsakorn Chasing, Wachara Benchaphanthawee, Phattananawee Nalaoh, Thanyarat Chawanpunyawat, Chokchai Kaiyasuan, Nawee Kungwan, Supawadee Namuangruk, Taweesak Sudyoadsuk, Vinich Promarak
Abstract
OLED devices based on <italic>o</italic>-hydroxyphenyl phenanthroimidazole (HPI) emitters showed a high maximum external quantum effciency of 8.13% with high brightness of 18 100 cd m<sup>−2</sup> and a maximum singlet exciton utilization efficiency of as high as 94%.
Topics & Concepts
ElectroluminescenceMaterials scienceIntramolecular forceOLEDSinglet stateExcited stateExcitonBrightnessOptoelectronicsPhotochemistryExcimerHydrogen bondQuantum efficiencyCharge (physics)Atomic physicsFluorescenceOpticsNanotechnologyMoleculeCondensed matter physicsPhysicsChemistryStereochemistryLayer (electronics)Quantum mechanicsOrganic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsOrganic Electronics and Photovoltaics