2015年12月
High-efficiency polymer solar cells with small photon energy loss
NATURE COMMUNICATIONS
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- 巻
- 6
- 号
- 開始ページ
- 10085
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/ncomms10085
- 出版者・発行元
- NATURE PUBLISHING GROUP
A crucial issue facing polymer-based solar cells is how to manage the energetics of the polymer/ fullerene blends to maximize short-circuit current density and open-circuit voltage at the same time and thus the power conversion efficiency. Here we demonstrate that the use of a naphthobisoxadiazole-based polymer with a narrow bandgap of 1.52 eV leads to high open-circuit voltages of approximately 1V and high-power conversion efficiencies of similar to 9% in solar cells, resulting in photon energy loss as small as similar to 0.5 eV, which is much smaller than that of typical polymer systems (0.7-1.0 eV). This is ascribed to the high external quantum efficiency for the systems with a very small energy offset for charge separation. These unconventional features of the present polymer system will inspire the field of polymer-based solar cells towards further improvement of power conversion efficiencies with both high short-circuit current density and open-circuit voltage.
- リンク情報
- ID情報
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- DOI : 10.1038/ncomms10085
- ISSN : 2041-1723
- Web of Science ID : WOS:000367569400005