Dual Mode Radiative Transition from a Phenoselenazine Derivative and Electrical Switching of the Emission Mechanism
Cho Long Kim, Jinhoon Jeong, Dong Ryun Lee, Ho Jin Jang, Seoung‐Tae Kim, Mu‐Hyun Baik, Jun Yeob Lee
Abstract
-phenoselenazin-3-yl)methanone. Selenium incorporated into the molecule increases the spin-orbit coupling to facilitate both TADF and phosphorescence, whereas donor-acceptor units promote TADF emission. The relative contribution of the green TADF and yellow phosphorescence can be controlled by the driving voltage of the devices. At low voltage, phosphorescence emission dominates the electroluminescence, whereas TADF is the major component at high voltages. The mechanism of dual emission was explored using experimental and theoretical methods.
Topics & Concepts
PhosphorescenceElectroluminescenceFluorescenceMaterials sciencePhotochemistryMoleculePhosphorescent organic light-emitting diodeOptoelectronicsChemistryNanotechnologyPhysicsOpticsOrganic chemistryLayer (electronics)Organic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsMolecular Junctions and Nanostructures