In this work, we report three donor-acceptor TADF emitters consisting of a strong electron acceptor, benzo[g]quinoxaline-5,10-dione, composed of electron-withdrawing diketone and pyrazine moieties, linked to triarylamine donors, MeTPA-BQ, tBuTPA-BQ and TPPA-BQ (Figure ). Compounds tBuTPA-BQ and TPPA-BQ were found to exhibit near-infrared piezochromism associated with large spectral shifts of ~98 nm and ~165 nm, respectively. The ground solids are stable under ambient conditions and can be heated to 200 °C without change in emission. The properties of the ground sample of TPPA-BQ could be restored to their original state upon ethyl acetate (EtOAc) fuming. As 2 wt% doped films in CBP, MeTPA-BQ, tBuTPA-BQ and TPPA-BQ all emit in the red and exhibit TADF, with ΦPL of 42% at 650 nm, 41% at 670 nm, and 39% at 625 nm, respectively. MeTPA-BQ and tBuTPA-BQ were used as emitters in OLEDs, which showed maximum external quantum efficiencies (EQEmax) of 10.1% at 650 nm and 8.5% at 670 nm, respectively.