To date, numerous MR-TADF emitters have been developed, some of which produce OLEDs that show fantastic performance including examples where the maximum external quantum efficiency (EQEmax) exceeds 40%. There are now many reported blue and green MR-TADF OLEDs including examples that approach the B.T. 2020 industry standard for green and blue emission. However, examples of orange/red MR-TADF OLEDs remain relatively rare due to the challenges in emitter design to red-shift the emission of the emitters. There are currently three primary methods for shifting the emission to the red: (1) Enhancing the donor and acceptor strength by constructing systems with electron-accepting (A) and donating atoms (D) in A-para-A and Dpara-D regiochemistry; (2) Decorating the MR-TADF core with donor or acceptor substituents to tune the energy of the emissive core; note that the use of too strong donors or acceptors results in the excited state being of long-range charge transfer (LRCT) character, resulting in less bright and broader emission; Finally, (3) is to adopt a dimerization strategy. Our group reported the first example of a dimeric MR-TADF emitter by connecting two DiKTa units (aka QAO or QAD) through a single bond in DDiKTa (Scheme S1). The photoluminescence (PL) was observed to red-shift from 451 nm for DiKTa to 470 nm for DDiKTa in toluene. Yasuda and coworkers reported another two isomeric MR-TADF dimers formed by tethering two MR-TADF fragments with different regiochemistry, para-B-p-B for p-CzB and para-N-p-N for m-CzB, as shown in Scheme S1. Compared to DtBuCzB (lPL = 489 nm), p-CzB and m-CzB emit at 504 and 515 nm in toluene, representing a modest red-shift of their PL. The devices with p-CzB and m-CzB showed EQEmax of 20.2 and 23.5%, respectively. Lan and co-workers reported another two MR-TADF dimeric emitters, DBF-DBN and DBT-DBN (Scheme S1). The OLEDs with DBF-DBN and DBT-DBN emitted at 514 and 516 nm and showed EQEmax of 21.5 and 31.3%, respectively. Each of these three reports documents a red-shifted emission of the dimeric emitters compared to their monomeric counterparts; however, the emission is in the green region and no example to date demonstrates that this strategy can be used to push the emission further to the red.