| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Outline of Final Research Achievements |
This research aimed at providing new design strategies to achieve controlled synthesis of organic materials with a nanoscale heterojunction of electronically different molecular units. We developed new organic semiconductors composed of electron donor and acceptor units as a component for donor/acceptor-type polymers applicable to organic solar cells. We found liquid crystalline molecules, having an extended pi-conjugated core and purposely-designed side chains, adopt homeotropic columnar orientation, beneficial for bilayer-type solar cells with a large-area heterojunction. We also showed that a particular space-filling design, relying on 2D nested hexagonal packing of a triptycene derivative allows the formation of large-area thin films with exceptionally long-range 2D structural integrity up to the centimeter length scale. Suitable modification of the triptycene building block would enable precision synthesis of new functional materials with molecular level heterojunctions.
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