“…In general, the challenge to generate RTP for organic chromophores lies in the insufficient intersystem crossing (ISC) caused by weak spin-orbit coupling (SOC), ultrafast nonradiative decays, and oxygen quenching. A variety of strategies have been proposed to promote ISC processes by inclusion of heavyand/or hetero-atoms 20,27,28 and deuteration, 29,30 and to suppress nonradiative relaxations using crystal engineering, [31][32][33][34][35] host-guest doping, 2,7,36 crosslinking, 37 polymerization [38][39][40][41] and many other methods. As a result, a growing number of organic RTP materials with long-lived lifetimes (4100 ms) under ambient conditions have been reported in recent years.…”