In conclusion, two deep-blue emitters, 1B-CzCrs and 2B-CzCrs, were developed to assess the impact of incorporating a carbazole moiety within this small MR-TADF core. The carbazole moiety contributed to turning on TADF in both emitters, but slowed the kRISC, especially in the case of the symmetric 2B-CzCrs. Nonetheless, we present here a comparative example that shows superior photophysical and device performance for the asymmetric design of 1B-CzCrs, which we believe is a promising strategy that can be applied in future designs of MR-TADF emitters. Despite the introduction of several large steric hindrance units, these two emitters were prone to aggregate. The poorer device efficiencies in mCP could be rationalized due to the slightly vertical dipole orientation of the emitters in this host. Nonetheless, the device with 1B-CzCrs in mCP could almost realize the BT. 2020 for blue with CIE of (0.146, 0.06) along with a moderate EQE of 12.8%, a significant improvement over the device with 1B-DTACrs.