Narrowband emission has, however, been demonstrated in multi-resonant TADF (MR-TADF) materials. MR-TADF compounds, first introduced by Hatakeyama and co-workers, are typically p-and ndopded nanographenes. OLEDs using MR-TADF emitters can simultaneously achieve narrowband emission and very high EQEmax. Inspired by our recent work on neutral MR-TADF emitters for OLEDs, we designed two charged analogs of DiKTa, (Figure ) to make them amenable for use as emitters in LEECs, DiKTa-OBuIm and DiKTa-DPA-OBuIm (Figure ). In 1 wt% doped mCP films, DiKTa-OBuIm emits in the green region (λPL = 499 nm, ΦPL = 71%, 1 wt% in mCP) and DiKTa-DPA-OBuIm is a red emitter (λPL = 577 nm, ΦPL = 61%, 1 wt% in mCP). The presence of the DPA group in DiKTa-DPA-OBuIm transforms this compound from one that is MR-TADF to one that better described as a donor-acceptor TADF, which is reflected in the red-shifted and broadened emission. 27