The chiral and achiral materials used in the following experiments are shown in Fig. . The achiral green (BDMAC-XT) emitters with thermally activated delayed fluorescence (TADF) property are prepared according to the reported methods , and the achiral sky-blue TADF emitter (DMAC-DPS) and red emitter (DBP) with normal fluorescence characteristic is acquired from commercial source. The new chiral near-ultraviolet ((S)-/(R)-PCNCP) and deep-blue ((S)-/(R)-PCNTPA) materials are synthesized facilely following the synthetic routes in Supplementary Scheme 1, and their structures are confirmed using NMR and high-resolution mass spectrometry.