Geometric Accommodation of Atom Repulsions Enables Sub-10 nm Ultra-Narrowband Multi-Resonance Blue Emitters.
Narrowband multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters are pivotal for high-color-purity organic light-emitting diodes (OLEDs), yet further bandwidth narrowing typically necessitates extended molecular rigidity that compromises synthetic accessibility and device compatibility. Herein, we...