Novel tetracoordinated organoboron emitters for thermally activated delayed fluorescence organic light-emitting diodes

A novel three-dimensional tetracoordinated organoboron acceptor bearing C<^>N<^>C chelate was developed by the direct borylation of pyridine derivatives. Donor-acceptor type emitter based on this novel organoboron acceptor exhibited good stability, high photoluminescence quantum yield (PLQY) and thermally activated delayed fluorescence (TADF) character. By selecting different donors with different electron donating abilities, two distinct electroluminescence devices with white and green emission achieved maximum external quantum efficiency of over 10%.

Automated summary

A novel three-dimensional tetracoordinated organoboron acceptor, developed by direct borylation of pyridine derivatives, showed good stability, high PLQY, and TADF properties in the donor-acceptor emitter. By selecting different donors with varying electron donating abilities, two distinct electroluminescent devices achieved over 10% maximum external quantum efficiency with white and green emission.