Blue fluorescent materials based on bis(10-phenylanthracen-9-yl) derivatives containing heterocyclic moiety

Abstract We synthesized a series of bis(10-phenylanthracen-9-yl) derivatives containing various heterocyclic moieties such as 9-ethylcarbazole, dibenzofuran and dibenzothiophene (1–3) by Suzuki cross-coupling reactions. To explore electroluminescent properties of these materials, multilayered devices were fabricated with configuration of indium–tin–oxide (ITO) (180 nm)/4,4′-bis(N-(1-naphthyl)-N-phenylamino)biphenyl (NPB) (50 nm)/Emitters 1–3 (30 nm)/Tris(8-hydroxyquinolinato) aluminium (Alq3) (15 nm)/lithium quinolate (Liq) (2.0 nm)/Al (100 nm). In particular, a device using 2,8-bis(10-phenylanthracen-9-yl)dibenzo[b,d]furan (2), as an emitter, exhibited efficient blue emission with maximum luminance, luminous, power and external quantum efficiency of 620 cd/m2, 2.05 cd/A, 1.05 lm/W, 1.43% at 20 mA/cm2, and CIE coordinates of (x = 0.18, y = 0.17) at 8 V, respectively.