With the initial motivation to develop deep-blue/near-UV MR-TADF emitters, and building on our previous work on diindolocarbazole-based emitters, we chose to investigate the photophysical properties of the nitrogen-containing indolocarbazole (NICz) family of emitters. This family of compounds was previously described by Kader et al., and in solution these compounds have been shown to be near-UV fluorescent emitters. However, their photophysical properties in the film state have, to the best of our knowledge, not previously been explored. Here, we evaluated the photophysical properties of four singly substituted NICz molecules, 4NICz, 5NICz, 6NICz, and 7NICZ, as well as one-doubly substituted molecule, 6,10NICz (Figure ). We find that three of the emitters exhibit dual fluorescence/RTP emission in doped PMMA films, even at very low doping concentrations, and dual MR-TADF/RTP emission in the emitters 6NICz and 6,10NICz, which is likely to be the first example of S1/T1 biluminescence from a MR-TADF emitter. The lifetimes