Novel thermally activated delayed fluorescence materials-thioxanthone derivatives and their applications for highly efficient OLEDs.

Wang, Hui; Xie, Lisha; Peng, Qian; Meng, Lingqiang; Wang, Ying; Yi, Yuanping; Wang, Pengfei · Adv Mater · 2014

basic_science · Level V

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Abstract

Thermally activated delayed fluorescence emitters with small energy gap between the triplet and singlet (ΔEST ), TXO-PhCz and TXO-TPA, have been successfully synthesized by combining a hole-transporting TPA/PhCz moiety and an electron-transporting TXO moiety. Both compounds display efficient solid-state luminescence with an efficient up-conversion of the triplet to singlet. OLEDs based on them exhibt high performance up to 21.5%, which is among the best reported for OLEDs.