Theoretical study on the mechanism of aggregation-induced emission in red thermally activated delayed fluorescence molecules: trans/cis-arrangement effect

Realization of highly efficient organic emitting diodes using thermally activated delayed fluorescence (TADF) materials with fast reverse intersystem crossing

“…Such a trade-off originates from the inefficient RISC between the singlet CT excited state and triplet CT excited state, thereby minimizing Δ E ST and making it technically impractical to improve k RISC . 20–22 Generally, the 〈S| Ĥ soc |T〉 value of an emitter with S 1 (CT state) and T 1 (CT) tends to be small but with a small Δ E ST , while 〈S| Ĥ soc |T〉 would be large if the molecule exhibits S 1 (CT) and T 1 (LE).…”