A new thermally activated delayed fluorescent molecule, , containing three phenothiazines as donor units and a 2,4,6-triphenyl-1,3,5-triazine as the acceptor unit was synthesized using a simple cost-effective method based on a cobalt catalyzed cross-coupling. This compound was tested in organic light-emitting diodes and was found to show superior yellowish-green electroluminescence performance with a maximum external quantum efficiency of 17.4% and a maximum luminance value of 7430 cd/m.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641307PMC
http://dx.doi.org/10.1021/acsomega.7b01570DOI Listing

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