ArticleAdvanced materials (Deerfield Beach, Fla.)2026
Hybridized Charge-Transfer Window within a Fully Conjugated Multi-Resonance Thermally Activated Delayed Fluorescence Framework for Ultrafast Reverse Intersystem Crossing and High-Efficiency in Deep-Blue Organic Light-Emitting Diodes.
Article in Advanced materials (Deerfield Beach, Fla.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Tetraborylated Multiple Resonance Emitter Incorporating B─O Bond-Embedded π-Extension for Ultra-Narrowband and High-Efficiency Blue Devices.Angewandte Chemie (International ed. in English) · 2026Article
- Molecular-topology-guided multiple-resonance emitters with sub-10-nm bandwidths: ultranarrow high-efficiency solution-processable OLEDs.National science review · 2026Article
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Authors and funding
4 authors.
Funding
Abstract
Multi-Resonance (MR) thermally activated delayed fluorescence (TADF) materials, featuring narrow band emission and high efficiency, are being utilized in blue organic light-emitting diode (OLED) applications. However, compared to conventional donor-acceptor (D-A) type TADF emitters, these molecules exhibit relatively large singlet-triplet energy gaps and slow reverse intersystem crossing (RISC) rates, indicating the need for further research to overcome these limitations. Herein, we designed deep blue MR-TADF molecules by integrating intramolecular short-range charge transfer and long-range charge transfer to minimize the singlet-triplet energy gap and accelerate the RISC rate through hybridized excited states maintaining a narrow emission bandwidth. Compared with conventional MR-TADF molecules emitting only by short-range charge transfer, the new MR-TADF molecule is differentiated in that intramolecular long-range charge transfer within the polyaromatic hydrocarbon framework additionally contributes to the emission process along with short-range charge transfer for accelerated RISC. As a result, the bfDOB-BN2 MR-TADF emitter exhibited narrow blue emission at 447 nm with a narrow full width at half maximum (FWHM) of 20 nm, a small singlet-triplet energy gap of 0.04 eV, and an ultrafast RISC rate of 2.1 × 10
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Registered trials
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