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The Effects of Two Spacers on White Organic Light-Emitting Diodes

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The authors have demonstrated highly efficient white organic light-emitting diodes (WOLEDs) by using two emissive materials as a dopant, 1,4-Bis[2-(4′-diphenylaminobiphenyl-4-yl)vinyl]benzene (DABPV-ph) and iridium(III) bis(5-acetyl-2-phenylpyridinato-N,C2′) acetylacetonate ((acppy)2Ir (acac)). In these WOLEDs, 2-methyl-9,10-di(2-naphthyl)anthracene (MADN), and 4,4′-N,N′-dicarbazole-biphenyl (CBP) were used as a spacer among the three emissive layers. The maximum luminous efficiency of the three devices with no spacer, MADN and CBP as a spacer were 11.50, 8.32, and 25.70 cd/A at 0.08, 12.7, and 0.01 mA/cm2 and the Commission Internationale De L'Eclairage (CIEx,y) coordinates were (x = 0 21, y = 0.34), (x = 0.21, y = 0.34), and (x = 0.33, y = 0.33) at 11 V, respectively.
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Document Type: Research Article

Publication date: 2008-09-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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