acceptor moiety have been synthesized and their structural, electrochemical and
photophysical properties thoroughly characterized. Combining Pydz with two phenoxazine
donor units linked via a phenyl bridge in a meta configuration (dPXZMePydz) leads to high
reverse intersystem crossing rate k RISC= 3.9· 106 s− 1 and fast thermally activated delayed
fluorescence (TADF) with< 500 ns delayed emission lifetime. Efficient triplet harvesting via …