We began our investigation by performing a computational analysis of the five emitters. The excited states of multi-resonant TADF molecules emitting via a short-range charge-transfer (SRCT) mechanism are well-known to be poorly modelled by time-dependent density functional theory (TD-DFT), owing to the lack of double excitation character in those methods. As such, we opted instead for the second-order algebraic diagrammatic construction method (ADC(2)), which we had previously demonstrated to accurately predict the properties of MR-TADF emitters. All ADC (2) calculations were performed using the Turbomole package, using the resolution of the identity approximation (RI) to reduce the calculation duration, spin-component scaling (SCS) for improved accuracy, and the cc-pVDZ basis set. Full computational details are available in the Supporting Information (Section S1).