Boron-containing D–A–A type TADF materials with tiny singlet–triplet energy splittings and high photoluminescence quantum yields for highly efficient OLEDs with low efficiency roll-offs

Abstract

D–A–A type TADF materials possessing concurrently a small Δ<italic>E</italic>_ST and a high <italic>Φ</italic>_PL for efficient OLEDs were constructed by utilizing boryl-containing tandem acceptors.