We have designed and synthesized a series of emitters based on anthraquinone and related pyrazoloanthrone as acceptor groups that are decorated with either 3,6-di-tert-butyl-9Hcarbazole/3,6-dimethoxy-9H-carbazole and DMAC donors and have investigated their optoelectronic properties (Figure ). The compounds emit very weakly from 640-750 nm in neat films. The emission of 10 wt% doped films in PMMA as a host matrix similarly ranges from 600-700 nm; unfortunately, the photoluminescence quantum yields, ΦPL, are very low, ranging from 2.6-6.6%. Compounds T-tBuCz-AQ, T-MeOCz-AQ, and C-tBuCz-AQ showed TADF with short delay lifetimes (τd) of 1 µs, 132 ns, and 0.7 µs. We also observed that tBuCz-PA showed reversible photoluminescence (PL) switching upon mechanical grinding and hexane solvent fuming.