A mesityl-functionalized double-boron-nitrogen-oxygen-embedded multi-resonance framework achieves anti-quenching narrowband deep-blue electroluminescence with EQE over 30% and CIE _<i>y</i> of 0.046.

ABSTRACT: Developing highly efficient deep-blue multi-resonance thermal activated delayed fluorescence (MR-TADF) materials for ultra-high-definition organic light-emitting diodes (OLEDs) displays that meet the stringent BT.2020 standard remains a significant challenge. In this study, we present a strategy to achieve high-performance deep-blue MR-TADF emitters by integrating a large π-conjugated double-boron-embedded MR skeleton with strategically positioned peripheral steric hindrance groups. The developed molecule, DMBNO, exhibits a narrow full-width at half maximum (FWHM) of 19 nm, with a deep-blue emission peak at 444 nm in diluted toluene solutions. Additionally, it achieves high photoluminescence quantum yield (PLQY) and a horizontal ratio of emitting dipole orientation (θ _∥)

SUBMITTER: Xue Z 

PROVIDER: S-EPMC11773358 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature