Synthesis and Photoelectrical Properties of Self-host Blue-green Phosphorescent Iridium (III) Complexes

A kind of self-host blue-green phosphorescent Ir (TIE) complexes [(CzPhBI)(2)Ir (tfmptz), (CzPhBI)(2)Ir(fpptz) and (CzPhBI),Ir (fpptz)] was designed and synthesized. CzPhBI, tfmptz, tfmpptz and fpptz were 9-[6-(2-phenyl-1-benzimidazolyl)hexyl]-9-carbazole, 2-(5-trifluoromethyl-1, 2, 4-triazolyl) pyridine, 2-[5-(4-trifluoromethyl) phenyl-1, 2, 4-triazolyl] pyridine and 2-[5-(4-fluoro) phenyl-1, 2, 4-triazolyl] pyridine, respectively. The structures were confirmed by nuclear magnetic resonance H-1 NMR and F-19 NMR) and elemental analysis. Photophysical properties were investigated. Electroluminescent performance of Ir(III) complexes were characterized by fabricating the non-doped devices with the configuration of indium tin oxid(ITO) vertical bar N, N'-bis-(1-naphthalenyl)-N, N'-bis-phenyl-(1, l'-biphenyl) -4,4'-diamine (NPB) (30 nm) vertical bar 4,4'-Bis(9-carbazolyl) -1,1'-biphenyl(CBP) (15 nm) Ir vertical bar complexes (30 nm) vertical bar 1,3,5-tris (1-phenyl-1H-benzo[d]imidazol-2-yl) benzene(TBPI) (30 nm) vertical bar LiF (1 nm) vertical bar Al (100 nm). The maximum luminance of (CzPhBI)(2)Ir (tmpptz) complexes was 6913 cd/m(2) and the maximum luminous efficiency achieved 13.9 cd/A.