An ionic transition-metal complex for improved charge transporting properties was designed, containing both n-type dimesitylboryl (BMes2) and p-type carbazole groups. The complex,[Ir (Bpq) 2 (CzbpyCz)] PF6 (1)(Bpq= 2-[4-(dimesitylboryl) phenyl] quinoline, CzbpyCz= 5, 5′- bis (9-hexyl-9H-carbazol-3-yl)-2, 2′-bipyridine) and its equivalent in which the BMes2 groups were substituted with carbazole moieties were evaluated on the ...