Fabrication of Organic Light-Emitting Diodes Using Photosynthetic Pigments Extracted from Spinach
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概要
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We fabricated organic light-emitting diodes (OLEDs) containing chlorophylls in the active region, which were extracted from spinach using a chemical method. Photoluminescence (PL) cannot be observed in the thin film of the extracted chlorophylls owing to concentration quenching. To overcome the concentration quenching, a host material, poly[(m-phenylenevinylene)-alt-(2,5-dihexyloxy-p-phenylenevinylene)] (PPV) was added in the active region. This leads to the observaton of electroluminescence (EL) signals originating from chlorophyll $a$. We also evaluated the lifetime of the PL and EL. Consequently, the OLEDs containing carotenoids in the active region exhibit the light-emission much longer time than that without carotenoidos. This is assigned to the antioxidant activities of carotenoids. OLEDs containing a large amount of carotenoids are resistant to the oxidation damage.
- 2011-01-25
著者
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Matsuda Takashi
Department Of Applied Mathematics And Physics Faculty Of Engineering Kyoto University
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Ohtani Naoki
Department of Electronics, Doshisha University, 3-1 Tatara-Miyakodani, Kyotanabe, Kyoto 610-0321, Japan
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Kitagawa Natsuko
Department of Electronics, Doshisha University, 3-1 Tatara-Miyakodani, Kyotanabe, Kyoto 610-0321, Japan
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