Self-Organization in Bulk Heterojunction Solar Cells with Small Molecules
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概要
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We fabricated both conventional and inverted bulk heterojunction solar cells by spin-coating with a rod-like liquid crystal of 1,4-diketo-N,N-dimethyl-3,6-bis(4-dodecyloxyphenyl) pyrrolo[3.4-c]pyrrole as a donor and C61PCBM as an acceptor. In both cell structures, we found that molecular reorientation and self-organization of the pyrrolopyrrole derivative occurred so as to form conduction channels after the thermal treatment at 60 °C for 30 min and that the power conversion efficiency was improved by 30 times, up to 1%. These results prove that the bulk nature of rod-like liquid crystals is effective for ordered bulk heterojunction solar cells leading to the improvement of the cell performance.
- 2012-11-25
著者
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Hanna Jun-ichi
Imaging Science & Engineering Laboratory Tokyo Institute Of Technology
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Usui Takayuki
Imaging Science And Engineering Lab Tokyo Institute Of Technology
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Takayashiki Yukiko
Imaging Science And Engineering Laboratory Tokyo Institute Of Technology
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Hanna Jun-ichi
Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Iino Hiroaki
Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, Nagatuta, Midori-ku, Yokohama 226-8503, Japan
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Nakano Kyohei
Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Iino Hiroaki
Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Iino Hiroaki
Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, J1-2, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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