Chemistry Letters, Vol.48, No.2, 126-129, 2019
Highly Efficient Thermally Activated Delayed Fluorescence with Slow Reverse Intersystem Crossing
We report an efficient luminescent molecule exhibiting thermally activated delayed fluorescence with a long-delayed fluorescence lifetime of 0.8 ms. Although the reverse intersystem crossing rate constant is small at 2.1 x 10(3) s(-1), the molecule shows a high photoluminescence quantum yield of 89 +/- 2%, indicating the suppression of nonradiative decay from the triplet state.
Keywords:Thermally activated delayed fluorescence (TADF);Reverse intersystem crossing (RISC);Long triplet lifetime