Spectroscopic Analysis of NIR-Dye Sensitization in Bulk Heterojunction Polymer Solar Cells |
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| Authors: | Shinzaburo Ito Hideo Ohkita Hiroaki Benten Satoshi Honda |
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| Affiliation: | 1.Department of Polymer Chemistry, Graduate School of Engineering,Kyoto University,Nishikyo,Japan;2.Nitto Denko Corporation,Toyohashi,Japan |
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| Abstract: | The photovoltaic conversion efficiency for near-infrared (NIR) sunlight is improved successfully by dye sensitization of bulk heterojunction polymer solar cells, in which the active layer was prepared by a ternary blend of poly(3-hexylthiophene), a fullerene derivative (1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]-methanofullerene), and an NIR dye, silicon phthalocyanine bis(trihexylsilyl oxide). The mechanism of the NIR-dye sensitization is studied by femtosecond transient absorption spectroscopy. |
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