Research on organic CPL-emitters that show thermally activated delayed fluorescence (TADF) has actively been pursued in response to the growing demand for low-cost, metal-free, and efficient circularly polarized organic light-emitting diodes (CP-OLEDs), which are useful for cutting-edge applications including 3D displays and security printing . To date, various chiral elements have been examined for the design of TADF-active CPL-emitters, including point chirality, axial chirality, and planar chirality .