Controlling Singlet–Triplet Energy Splitting for Deep‐Blue Thermally Activated Delayed Fluorescence Emitters. (30th December 2016)

• Record Type: Journal Article
• Authors: Cui, Lin‐Song; Nomura, Hiroko; Geng, Yan; Kim, Jong Uk; Nakanotani, Hajime; Adachi, Chihaya
• Is Part Of: Angewandte Chemie. Volume 129:Number 6(2017)
• Page Start: 1593
• Page End: 1597
• Publication Date: 2016-12-30
• Subjects: Carbazol -- Fluoreszenz -- Organische Elektronik -- Organische Leuchtdioden -- Singulett-Triplett-Aufspaltung; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201609459
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The development of efficient metal‐free organic emitters with thermally activated delayed fluorescence (TADF) properties for deep‐blue emission is still challenging. A new family of deep‐blue TADF emitters based on a donor–acceptor architecture has been developed. The electronic interaction between donor and acceptor plays a key role in the TADF mechanism. Deep‐blue OLEDs fabricated with these TADF emitters achieved high external quantum efficiencies over 19.2 % with CIE coordinates of (0.148, 0.098).