Blue Electroluminescent Materials Based on Dibenzofuran-Containing Anthracene Derivatives for Organic Light-Emitting Diodes

초록

Four blue electroluminescent materials based on anthracene derivatives were synthesized. To investigate the EL properties, multilayered devices were fabricated with following sequences; Indium tin oxide (ITO, 180 nm)/N,N'-Di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4 '-diamine (NPB, 60 nm)/Blue emitting materials (30 nm)/Bathophenanthroline (Bphen, 30 nm)/Lithium quinolate (Liq, 2 nm)/Al (100 nm). All devices showed the blue emissions. Particularly, a device using 10-(dibenzo[b, d]furan-4-yl)-9-(naphthalene-2-yl)anthracene showed the good EL properties with the luminance, luminous-, power-, and external quantum efficiency of 2410 cd/m(2), 2.32 cd/A, 1.36 lm/W, and 1.99% at 30 mA/cm(2), respectively. The CIE coordinates of this device was (x = 0.17, y = 0.14) at 6.0 V.

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