Abstract
Transparent white organic light-emitting devices with a cathode are reported. The device with a structure of indium-tin oxide/ -tris(3-methylphenyl-phenylamino)-tripheny-lamine -bis-(1-naphthyl)- -diphenyl- -biph-enyl--diamine (NPB: )/rubrene -(1,3,5-phenylene) tris(1-phenyl- - benzimidazole /tris (8-hydroxyquinoline) aluminum (, volume ratio 1:1) shows few differences in luminance and color purity from both sides. For instant, at a driving voltage of , the luminance and CIE coordinates of and are obtained from top/bottom sides. CIE coordinates of the device from both sides are voltage independent, and the maximum total electroluminescence efficiencies of the device are .
© 2009 Optical Society of America
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