Late-stage direct double borylation of B/N-based multi-resonance framework enables high-performance ultra-narrowband deep-blue organic light-emitting diodes.

ABSTRACT: Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials are promising for organic light-emitting diodes (OLEDs) owing to their narrowband emission and efficient triplet utilization. However, realizing stable deep-blue emission with high practical efficiency remains challenging, largely due to limited strategies for hypsochromic shifts without compromising photophysical properties. Here, we report a late-stage direct double borylation strategy for B/N-based MR frameworks, which extends π-conjugation resonance, increases transition energy, enhances transition dipole moment, and reduces the S₁-T₁ energy gap. The proof-of-concept emitter, ν-DABNA-M-B-Mes, exhibits blue-shifted emission compared to its parent molecule while maintaining excellent TADF c

SUBMITTER: Hao J 

PROVIDER: S-EPMC12501214 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature