Highly Efficient Green and Red Narrowband Emissive Organic Light‐Emitting Diodes Employing Multi‐Resonant Thermally Activated Delayed Fluorescence Emitters**
نویسندگان
چکیده
Herein, we demonstrate how judicious selection of donor decorating a central multi-resonant thermally activated delayed fluorescence (MR-TADF) core based on DiKTa can lead to very high-performance OLEDs. Decorating the with triphenylamine (TPA) and diphenylamine (DPA), 3TPA-DiKTa 3DPA-DiKTa exhibit bright, narrowband green red emission in doped films, respectively. The OLEDs these emitters showed record-high performance maximum external quantum efficiencies (EQEmax) for this family emitters, EQEmax 30.8% at λEL 551 nm 16.7% 613 nm. efficiency roll-off was improved significantly by using 4CzIPN as an assistant dopant hyperfluorescence (HF) devices. outstanding device has been attributed preferential horizontal orientation transition dipole moments 3DPA-DiKTa.
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ژورنال
عنوان ژورنال: Angewandte Chemie
سال: 2022
ISSN: ['1521-3773', '1433-7851', '0570-0833']
DOI: https://doi.org/10.1002/ange.202213697