A practical and efficient synthesis of 4-(triphenylen-2yl)dibenzothiophene, a phosphorescent host, has been established via ligand-free palladium on carbon (Pd/C) catalyst mediated Suzuki coupling reaction. The process allowed us to recover and reuse the heterogeneous Pd/C catalyst for costeffectiveness with a conversion yield greater than 90 %. Moreover, interesting results on solid-state studies of the sublimed title material have been captured along with its photo-physical and electrochemical properties, which are appropriate for its use as a host material. Finally, we have fabricated solutionprocessed organic light-emitting diodes (OLEDs) by using the title material as a host and bis(4-phenylthieno[3,2-c]pyridinato-N,C2') (acetylacetonate) iridium(III) (PO-01), as a phosphorescent dopant. The devices exhibited efficiencies of ∼ 9 cd/A at 1000 cd/m 2 , and the results were comparable with the traditional host, 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP).
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