Photoluminescence and electroluminescence of a new blue-emitting homoleptic iridium complex

A new electrophosphorescent material, iridium(III)tris(5-(2,4-difluoro-phenyl)-10,10- dimethyl-4-aza-tricycloundeca-2,4,6-triene), Ir(F-2-mppy)(3), has been synthesized and characterized. Ir(F-2-mppy)(3) shows strong blue emission peaking at 475 nm with a high phosphorescent quantum yield (Phi(PL)) of 0.72 in degassed toluene. Electroluminescent devices with a structure of indium tin oxide (ITO)/NPB (40 nm)/Ir(F-2-mppy)(3)(x):CBP (30 nm)/BCP (6 nm)/Alq(3) (20 nm)/Mg:Ag (10:1) and 15% (10%) exhibit a maximum luminous power efficiency of 9.58 lm/W (7.68 lm/W), CIE coordinates (x=0.18,y=0.36) (x=0.17,y=0.29), and a maximum luminance of similar to 9000 cd/m(2) at 12.5 V (similar to 6000 cd/m(2) at 11.5 V).