compounds have been increasingly used in the academic community as alternatives to organometallic complexes, initially as emissive materials for organic light-emitting diodes (OLEDs), and later, as PCs. This is because TADF compounds have accessible triplet states owing to the small energy gap (∆EST) between the lowest excited singlet (S1) and triplet states (T1), which allows for relatively fast ISC and reverse ISC (RISC) to take place, despite the small SOC between these states in the absence of heavy atoms. Molecules with small ∆EST are those where the donor (D) and acceptor moieties (A) are sufficiently electronically decoupled such that there is minimal orbital overlap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), i.e., the exchange energy is small. This spatial separation also produces an emissive excited state having charge transfer (CT) character. The most widely employed molecular design is a strongly twisted D-A structure, exemplified in 4CzIPN and 4DPAIPN (Figure ). Owing to the distance between D and A units, the excited state character is termed long-range charge transfer (LRCT). D-A TADF PCs based on carbazoyl dicyanobenzenes (CDCBs) have been extensively employed as PCs in myriad photocatalytic reactions. This family of TADF PC covers a broad range of ET. For example, the ET values of 4DPAIPN, 4CzTPN, 2CzIPN, 4CzIPN, and 3,5-2CzBN increase from 2.30 eV to 2.34, 2.72, 2.73, and 3.03 eV, respectively. These values overlap with those of, for example, [Ir(dF(CF3)ppy)2(dtbbpy)]PF6