The doped materials have almost only RTP and TADF emissions, the hosts can tune the proportion of excitons in TADF and RTP, resulting in the afterglow colors gradually redshift from cyan to yellow-orange.

Two novel 2,7-naphthyridine derivatives are unexpectedly synthesized by the reaction of 2-(3,5-diaryl-4H-pyran-4-ylidene)malononitrile and benzylamine, which are achieved through different ring-closing ways. These two derivatives with twisted molecular conformations display phosphorescence,...