Dendritic thermally activated delayed fluorescence sensitizers for efficient deep-blue narrowband organic light-emitting diodes

Dendritic TADF sensitizers are developed by strategically introducing a methyl group into a benzonitrile/carbazole dendron framework, giving maximum EQE of 19.0% and CIE coordinates of (0.142, 0.056) for solution-processed deep-blue narrowband OLEDs.