In addition, when connected to strong donors, DiKTa can also act as an acceptor in D-A TADF emitters. Yuan et al. first reported QAO-DAd with two 9,9-dimethyl-9,10dihydroacridine (DMAC) as donors. QAO-DAd emits at λPL of 548 nm in toluene, has a high FPL of 89.8% and a small ΔEST of 0.01 eV in 5 wt% doped films in CBP.