Decisive role of heavy-atom orientation for efficient enhancement of spin–orbit coupling in organic thermally activated delayed fluorescence emitters
Michał Mońka, Daria Grzywacz, Estera Hoffman, Vladyslav Ievtukhov, Karol Kozakiewicz, Radosław Rogowski, A. Kubicki, Beata Liberek, Piotr Bojarski, Illia E. Serdiuk
Abstract
A heavy-atom field effect (HAFE) is discovered in red TADF emitters bearing Br atoms in donor fragment. Depending on the position of heavy atoms, HAFE can either accelerate or inhibit reverse intersystem crossing.
Topics & Concepts
Intersystem crossingMaterials scienceAtom (system on chip)FluorescenceCoupling (piping)Spin–orbit interactionSpin (aerodynamics)Atomic physicsMolecular physicsOrientation (vector space)PhotochemistryCondensed matter physicsOpticsPhysicsChemistryExcited stateGeometryEmbedded systemSinglet stateThermodynamicsComputer scienceMathematicsMetallurgyOrganic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsLanthanide and Transition Metal Complexes