Simultaneously enhancing the planarity and electron-donating capability of donors for through-space charge transfer TADF towards deep-red emission
Xiu‐Fang Song, Chenglin Jiang, Nengquan Li, Jingsheng Miao, Kai Li, Chuluo Yang
Abstract
= 665 nm) region. The photoluminescence quantum yields are 41% and 32% for TPXZ-QX and TPXZ-2QX, respectively. Organic light-emitting diodes (OLEDs) based on TPXZ-QX and TPXZ-2QX show external quantum efficiencies (EQEs) of up to 13.8% and 11.4%, respectively. This work indicates that the modulation of TSCT excited states based on strong intramolecular cofacial π-stacking interactions is a viable choice for the development of high-efficiency long-wavelength TADF emitters.
Topics & Concepts
Intramolecular forcePlanarity testingExcited stateCharge (physics)FluorescencePhotochemistryAcceptorElectronElectron transferMaterials scienceElectron acceptorChemistryChemical physicsAtomic physicsCrystallographyPhysicsStereochemistryOpticsCondensed matter physicsQuantum mechanicsOrganic Light-Emitting Diodes ResearchPhotochemistry and Electron Transfer StudiesLuminescence and Fluorescent Materials