data. However, we do recognize that previous LEC studies have demonstrated that detrimental exciton-polaron quenching can be efficiently alleviated by a balancing of the electron and hole transport within the active material. In this context, we note that TPPO-tBu-DiKTa forms electron but not hole traps in the 26DCzPPy:TCTA matrix, whereas TPA-tBu-DiKTa forms both electron and hole traps (Figure ). It is thus reasonable that a non-balanced mobility (specifically a much higher hole than electron mobility) will prevail in the TPPO-tBu-DiKTa LEC, which is comparatively more balanced in the TPA-tBu-DiKTa LEC. In line with the earlier findings, this would thus explain the higher EQEmax. The significantly improved operational stability of the TPA-tBu-DiKTa LECs can be attributed to the shorter value of τd (Table ), which will mitigate both exciton-exciton and exciton-polaron quenching and related deleterious side reactions. In this context, we mention that the measured operational lifetime of the optimized TPA-tBu-DiKTa LEC represents an improvement by a factor of 5 compared to the state-of-the-art in the MR-TADF LEC field.