ArticleNature communications2026
B-N-B Embedded multiple-resonance polyaromatic enabling efficient narrowband electroluminescence.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Boron/nitrogen (B/N)-doped multi-resonance thermally activated delayed fluorescence (TADF) molecules have emerged as benchmark narrowband emitters for organic light-emitting diodes (OLEDs). However, these emitters face persistent challenges in synthesis and optoelectronic performance, notably aggregation-induced spectral-broadening and inefficient reverse intersystem crossing (RISC). Here, we introduce a molecular design that incorporates a B-N-B covalent-bond into a multiple resonance (MR) framework, synergistically combining narrowband emission of para-positioned B/N with a helically distorted B-N-B configuration that enhances spin-orbit coupling and suppresses molecular aggregations. A lithium-free, stepwise nitrogen-directed borylation enables high-synthesis-yield ( > 80%) targeted emitters, affording deep-blue (452 nm) and greenish (495 nm) TADF emissions with full-width-at-half-maximum of merely 12-14 nm, near-unity photoluminescence quantum yields and accelerated RISC rates ( > 10
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