Electroluminescent properties of diphenylamino-dibenzo[g,p]chrysene derivatives

초록

We designed and synthesized two diphenylamino-dibenzo[g,p]chrysene derivatives. To investigate EL properties of these blue emitting compounds, devices were fabricated as following structure : indium-tin-oxide (ITO) (180nm) / N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1-biphenyl)-4,4-diamine (NPB) (50nm) / 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (mADN); emitters 1 and 2 (3% doping) (20nm) / tris(8-hydroxyquinolinato)aluminum (Alq(3)) (30nm) / lithium quinolate (Liq) (1nm) / Al (100nm). Particularly, a device using 3,6-dimethyl-11,14-bis(diphenylamino)-dibenzo[g,p]chrysene as a dopant showed good EL properties with power, luminous, and external quantum efficiency of 0.99lm/W, 2.28 cd/A, and 2.81%, respectively, at 20mA/cm(2). The CIE coordinates were (0.15, 0.12) at 6.0V.

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