ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
Acceptor-Bridged Engineering Enables Highly Efficient Solution-Processed Pure-Green MR-TADF OLEDs With External Quantum Efficiency of 29% and Small Roll-Off.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Acceptor-Bridged Engineering Enables Highly Efficient Solution-Processed Pure-Green MR-TADF OLEDs With External Quantum Efficiency of 29% and Small Roll-Off.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
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9 authors.
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Abstract
The pursuit of next-generation ultrahigh-definition displays has intensified the demand for narrowband emitters with exceptional color purity and high efficiency. Despite the demonstrated superiority of multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters in vacuum-deposited OLEDs, their solution-processing implementation faces significant challenges stemming from inherent molecular rigidity, which compromises solubility, film morphology, and inefficient exciton utilization. Herein, two novel solution-processable, pure-green MR-TADF emitters, DBN-Pym and DBN-PhPym, are reported via an acceptor-bridged engineering strategy that integrates MR cores with electron-withdrawing pyrimidine bridges. Such a design simultaneously enhances the solubility through controlled molecular torsion and precisely modulates the electron distribution via synergistic long- and short-range charge transfer. Consequently, the resulting emitters exhibit narrowband green emission (514/513 nm, full width at half maximum, FWHM: 24-30 nm) with remarkably high photoluminescence quantum yields (PLQYs) of 86% and 99%, respectively. Solution-processed OLEDs exhibit peak emissions at 526/521 nm with Commission Internationale de L'Eclairage (CIE) y coordinates exceeding 0.69. Notably, the DBN-PhPym achieves a record external quantum efficiency (EQE) of 29.0% (maintaining 28.3% at 1000 cd m
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