| Budget Amount *help |
¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
|
|---|
| Outline of Final Research Achievements |
Organic photovoltaics (OPV) devices containing a polymer/fullerene-based bulk heterojunction, have attracted much interest because of their potential for low-cost, large-area, lightweight, and flexible devices with simple structures. The fullerenes and their derivatives bearing various functional group side chains have been used as n-type semiconductor materials in OPV devices with high-efficiency photoelectric conversion. Electronic structure of the fullerene derivatives has been systematically investigated in this study by photoemission and inverse photoemission spectroscopy. It was found that the electronic structures of the fullerene derivatives strongly depended on structural features, including the type of backbone, number of side chains, side chain length, and functional groups. Fundamental information about the electronic structure of fullerene derivatives obtained in this study can be expected to guide the synthesis of new molecules optimized for high-performance OPVs.
|
