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Home / Journal of Nanoscience and Nanotechnology, Volume 16, Number 10

Bipolar Host Materials with Carbazole and Isoquinoline/Benzothiazole Moieties for Green Phosphorescent Organic Light-Emitting Diodes

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In this study, we demonstrate three bipolar host materials based on carbazole and isoquinoline/benzothiazole derivatives for use in green phosphorescent organic light-emitting diodes. Particularly, 9-[4-(isoquinolin-1-yl)phenyl]-9H-carbazole (1) exhibited good properties for use in green phosphorescent organic light-emitting diodes. A device using compound 1 as the host with the green phosphorescent dopant bis[2-(1,1′,2′,1″-terphen-3-yl)pyridinato- C,N]iridium(III)(acetylacetonate) showed the green emission with a maximum external quantum efficiency, power efficiency, and luminance efficiency of 8.1%, 26.71 lm/W, and 29.76 cd/A at 20 mA/cm2, respectively. The Commission International de L’Eclairage (CIE) chromaticity coordinates of this device were (0.35, 0.61) at 8.0 V.

Keywords: Bipolar Host; Host-Dopant System; Organic Light-Emitting Diodes; Phosphorescence

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea 2: Department of Information Display, Hongik University, Seoul, 121-791, Korea

Publication date: 01 October 2016

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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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