Constructing High‐Efficiency and Stable Hyperfluorescence Blue OLEDs via TADF Sensitizers with Very Short Delayed Lifetimes
Hyperfluorescence blue organic light-emitting diodes (OLEDs) are promising for fabricating pure organic blue devices with high efficiency and color purity by employing thermally activated delayed fluorescence (TADF) sensitizers and multiple-resonance TADF (MR-TADF) emitters. However, developing blue TADF sensitizers with the rate of reverse intersystem crossing (k<sub>RISC</sub>) over 10<sup>7</sup> s<sup>-1</sup> remains a challenge. In this work, a blue TADF sensitizer with k<sub>RISC</sub> of 9.71 × 10<sup>6</sup> s<sup>-1</sup> has been designed by regulating the energy levels of the excited states and enhancing the spin-orbit coupling (SOC) effect. v-DABNA is further doped to fabricate the hyperfluorescence device, which exhibits a high maximum external quantum efficiency of 31.0% and a long operational lifetime of 175.4 h. The results reveal the significance of k<sub>RISC</sub> and pave the way for designing blue TADF sensitizers and hyperfluorescence devices.
Authors
- Baoyan Liang (ORCID: https://orcid.org/0000-0003-1256-9440)
- Hai Bi (ORCID: https://orcid.org/0000-0002-2017-3668)
- Yufang Nie (ORCID: https://orcid.org/0009-0002-5423-5131)
- Yue Wang (ORCID: https://orcid.org/0000-0001-6936-5081)
- Zhiqiang Li (ORCID: https://orcid.org/0000-0002-3283-6385)
- Chi Cao (ORCID: https://orcid.org/0009-0004-0610-211X)
- Chao Jiang
Institutions
- Jilin University (CN)
- Ji Hua Laboratory (CN)
- State Key Laboratory of Supramolecular Structure and Materials
Publication Details
- Journal
- Angewandte Chemie International Edition
- Published
- 2025-12-03
- DOI
- https://doi.org/10.1002/anie.202524373
- Primary Topic
- Organic Light-Emitting Diodes Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Basic and Applied Basic Research Foundation of Guangdong Province