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Pyridine/Isoquinoline-Carbazole Containing Bipolar Host Materials for Green Phosphorescent Organic Light-Emitting Diodes

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We demonstrated the electroluminescent properties of bipolar host materials such as 9-(3-(6-methylpyridin-2-yl)phenyl)-9H-carbazole (Czpmpy), 9-(6-phenylpyridin-2-yl)-9H-carbazole (Czppy), and 9-(3-(isoquinolin-1-yl)phenyl)-9H-carbazole (Czpiq). Particularly, by using host (Czpiq)and dopant (bis[2-(1,1′,2′,1″-terphen-3-yl)pyridinato-C,N]iridium(III) (tphpy)2Ir(acac)) as the emitting layer, a green phosphorescent OLED was fabricated, showing a maximum luminance of 12780 cd/m2 at 10 V, maximum luminous efficiency of 45.0 cd/A, power efficiency of 47.1 lm/W, maximum external quantum efficiency of 12.3%, and CIE x,y coordinates of (0.34, 0.58) at 8 V.
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Keywords: BIPOLAR HOST; GREEN PHOSPHORESCENCE; OLEDS; PYRIDINE/ISOQUIOLINE-CARBAZOLE CONTAINING MATERIALS

Document Type: Research Article

Publication date: 2011-02-01

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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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