Synthesis and Properties of Short-Lifetime Thermally Activated Delayed Fluorescence Materials.

Compounds , , , , and were conveniently synthesized, and they were found to exhibit TADF properties with lifetimes of 857, 575, 561, 768, and 600 ns, respectively. These short lifetimes of the compounds might be due to the combination of small singlet-triplet splitting energy (Δ) and benzoate group, which could be an efficient strategy for the further design of short-lifetime TADF materials.