Enhancement of Light Extraction from Organic Light-Emitting Diodes with Two-Dimensional Hexagonally Nanoimprinted Periodic Structures Using Sequential Surface Relief Grating
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概要
- 論文の詳細を見る
Electric characteristics of organic light-emitting diodes (OLEDs) with two-dimensional hexagonally nanoimprinted periodic structures were investigated, and enhanced light extraction from this device was confirmed. A master mold was fabricated from an azobenzene polymer thin film patterned by sequential surface relief grating formation into a three-directional structure. The device shows a higher current density and a higher current efficiency, although leakage current is also higher than that of a device without periodic structures. These results are caused by the extraction of diffracted light from waveguided and substrate-guided light even when incident light has larger angles than the critical angle for total reflection.
- 2008-06-25
著者
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Takanishi Yoichi
Department Of Organic And Polymeric Materials Tokyo Institute Of Technology
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Araoka Fumito
Department Of Organic And Polymeric Materials Tokyo Institute Of Technology
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Takezoe Hideo
Department Of Organic And Polymeric Materials Tokyo Institute Of Technology
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西村 涼
慶応義塾大学理工学部
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Nishimura Suzushi
Nippon Oil Corporation Central Technical Research Laboratory
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Ishikawa Ken
Department Of Organic And Polymeric Materials Tokyo Institute Of Technology
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Jeong Soon
Department Of Chemical Engineering Korea University
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Jeong Soon
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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Machida Yoshimi
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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Suzaki Goro
Nippon Oil Corporation, Central Technical Research Lab., 8 Chidori-cho, Naka-ku, Yokohama 231-0815, Japan
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Araoka Fumito
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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Nishimura Suzushi
Nippon Oil Corporation, Central Technical Research Lab., 8 Chidori-cho, Naka-ku, Yokohama 231-0815, Japan
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ISHIKAWA Ken
Department of Applied Physics, University of Tokyo
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