Fabrication of organic light-emitting diodes using natural pigments extracted from plants

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420348
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Doshisha University
• Principal Investigator: Ohtani Naoki 同志社大学, 理工学部, 教授 (80359067)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 有機EL / カロテノイド / 抗酸化作用 / 蛍光寿命

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.

Free Research Field

半導体光デバイス