FPL: 83%; τd: 1.47 µs; ΔEST: 0.03 eV; 25 wt% in TCTA:Bepp2) showed the same green emission and similar photophysical properties. The introduction of a second TRZ acceptor did not improve the FPL as other studies Reproduced with permission. The dimerization strategy (Figure ) could also be used to convert a non-TADF emitter into a TADF emitter, as Lee et al. demonstrated by transforming the fluorescent emitter Cz-TRZ into a TADF emitters (TRZoCz and TRZotCz) by increasing the separation of the FMOs in the dimer structures. The highly twisted geometries in TRZoCz and TRZotCz lead to markedly smaller ΔEST (0.20 eV for TRZoCz, 0.06 eV for TRZotCz) compared to Cz-TRZ (0.36 eV).