| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
The objective of this research activity is the reduction of a surface plasmon loss and the improvement of optical extraction efficiency which occupy approximately a half of optical losses in the organic light emitting devices. For this reason, I developed the optical method which connects seamlessly the surface plasmon resonance in the metal electrode with the optical propagation in an organic thin film by employing original multi-scale analysis. Moreover, the refractive index controlled substrate was used in the organic EL device together with the multi-cathode structure. Research results showed that external quantum efficiency was improvable two or three times compared with conventional EL structure. These results suggest the importance and possibility of optical design technique towards an improvement in luminous efficiency. It will be possible of the white organic EL device exceeding 50% of external quantum efficiency.
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