Introduction of extra carbazole donor to form the D′–A–D type TADF emitters did not disturb the emitting color, but reduced intermolecular interactions and exciton quenching, thus improved the EQE in OLEDs and eliminated efficiency decay.
Blue thermally activated delayed fluorescence (TADF) materials with substantial donors and acceptors skeleton for OLEDs.
Linear acenes, such as naphthalene, can act as acceptors in donor–acceptor type TADF emitters. We demonstrate this strategy through a computational screen and by synthesizing a novel diphenoxazine-substituted naphthalene TADF emitter.
The tuning of the TADF property by changing the electron donating or withdrawing magnitude is achieved in electron donor–acceptor dyads.
Post-synthetic gridization transforms conventional TADF emitters into nanogrid macrocycles with enhanced spin-flip dynamics, horizontal alignment, and ozone stability, enabling the fabrication of highly efficient solution-processed OLEDs.