9,10-Diphenylanthracene derivative substituted with indole moiety for blue organic light-emitting diodes

摘要

In order to develop blue emitters in organic light-emitting diodes (OLEDs), we synthesized two materials, 9-(9,10-diphenylanthracen6-yl)-9H-carbazole and 1-(9,10-diphenylanthracen-6-yl)-1H-indole by Buchwald-Hartwig reactions. To investigate their electroluminescent performances, multilayer devices were fabricated by following structure: indium-tin-oxide (ITO) (180 nm) / N,N'-di(1- naphthyl)-N, N'diphenyl-(1,1'-biphenyl)-4,4'-diamine (NPB) (50 nm) / blue emitters (30 nm) / 4,7-diphenyl- 1,10-phenanthroline (Bphen) (30 nm) / lithium quinolate (Liq): Al (100 nm). A device using 1-(9,10-diphenylanthracen-6yl)-1H-indole exhibited an efficient blue emission with luminous, power, and external quantum efficiency of 3.11 cd/A, 1.60 im/W, and 2.82% at 20 mA/cm(2), respectively and CIE (x,y) coordinates of (0.15, 0.13) at 6.0 V.