The first multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters incorporating tellurium—the heaviest stable chalcogen—have been developed by Takuma Yasuda and co-workers in the Research Article (e24098). Simply linking a dibenzob,dtellurophene unit dramatically accelerates excitonic spin conversion between triplets and singlets. This design concept is applicable to various MR-TADF and other functional π-conjugated frameworks, enabling advanced optoelectronic applications.
Yang et al. (Fri,) studied this question.