There are several advantages for the use of triazine within TADF materials. These include: (1) triazine and its derivatives are easy to synthesize from inexpensive starting materials; (2) triazine is easily functionalized at the 2,4,6 positions, and can be done both symmetrically or asymmetrically, thereby increasing structural diversity; (3) the linkage between the electrondonor and the triazine core can be rationally adjusted; (4) triazine is a stable aromatic structure that contributes to improved operational lifetimes of the devices. Documenting the popularity of this moiety, in this review, we summarize the recent progress of triazine-containing TADF materials. First, the TADF emitters based on carbazole-triazine structures are introduced and classified according to: i) the number and substitution position of the carbazole; ii) the influence of the bridge between the donor and the triazine acceptor; iii) the influence of the structure on the orientation of the emitter within the emitter layer, which will affect the orientation of the TDM and hence the light outcoupling efficiency in the device; iv) trisubstitution about the triazine core; v) dimerization strategies where there are at least two triazines within the material;