| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Outline of Final Research Achievements |
We evaluated the antioxidant effect of carotenoids extracted from spinach on photoluminescence (PL) lifetime of organic emissive materials.
By using the column chromatography method, one of carotenoid dyes β-carotene was isolated and purified from spinach. To evaluate PL lifetime of the mixture of organic emissive materials and β-carotene, we found that PL lifetime was drastically improved. Not only that, the PL intensity was increased due to the β-carotene doping. These results demonstrate that antioxidant effect of β-carotene is very useful to improve the operation lifetime of organic emissive materials. This implies that abundant plant pigments are very useful for low-cost production of OLEDs.
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