There are mainly two strategies for designing chiral MR-TADF emitters. The first one is chiral perturbation, which refers to introducing a peripheral chiral unit into an achiral MR-TADF structure that does not directly participate in the radiative S1-S0 transition. Table ). These two compounds emit at lPL of 498 and 510 nm (full-width at half maximum, FWHM of 32 and 35 nm), have FPL of 95 and 90% and |gPL| values of 9.1 × 10 -4 and 1.04 × 10 -3 in 3 wt% doped films in PhCzBCz, respectively. Although materials based on chiral perturbation are generally easy to synthesize and do not need enantiomer separation as the chiral unit that is incorporated is generally already enantiopure, they tend to show weak CPL signals. The second strategy involves the design of MR-TADF emitters that possess an intrinsically chiral skeleton. To date, there are only a few examples of chiral MR-TADF emitters based on this strategy. They have either point, axial, 21 planar, or helically chiral skeletons (Figure ,