A dual-locked triarylamine donor enables high-performance deep-red/NIR thermally activated delayed fluorescence organic light-emitting diodes
Hui Wang, Jia‐Xiong Chen, Lu Zhou, Xi Zhang, Xi Zhang, Jia Yu, Kai Wang, Xiaohong Zhang, Xiaohong Zhang
Abstract
, an enhanced PLQY value and aggregation-induced emission (AIE) properties, which allows for effectively alleviating concentration quenching compared to the control compound using a conventional triarylamine derivative as D units. The DCN-DSP-based OLEDs with modulated doping concentrations exhibit champion EQEs of 36.2% at 660 nm, 26.1% at 676 nm and 21.3% at 716 nm, which are record-high efficiencies among all TADF OLEDs in the similar emission ranges. This work realizes the efficiency breakthrough of DR/NIR TADF OLEDs, and such a promising molecular design approach may inspire even better DR/NIR TADF emitters in the future.
Topics & Concepts
OLEDMaterials scienceElectroluminescenceOptoelectronicsFluorescenceDiodeCommon emitterQuenching (fluorescence)DopingNanotechnologyOpticsPhysicsLayer (electronics)Organic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsOrganic Electronics and Photovoltaics