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タイトル: | High-efficiency polymer solar cells with small photon energy loss. |
著者: | Kawashima, Kazuaki Tamai, Yasunari https://orcid.org/0000-0002-3074-0208 (unconfirmed) Ohkita, Hideo https://orcid.org/0000-0002-7403-3492 (unconfirmed) Osaka, Itaru Takimiya, Kazuo |
著者名の別形: | 川島, 和彰 玉井, 康成 大北, 英生 尾坂, 格 瀧宮, 和男 |
キーワード: | Chemical sciences Materials science Applied physics Physical chemistry |
発行日: | 2-Dec-2015 |
出版者: | Nature Publishing Group |
誌名: | Nature communications |
巻: | 6 |
論文番号: | 10085 |
抄録: | 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 1 V and high-power conversion efficiencies of ∼9% in solar cells, resulting in photon energy loss as small as ∼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. |
記述: | 有機薄膜太陽電池で飛躍的なエネルギー変換効率の向上が可能に --新材料開発で光エネルギー損失低減に成功--. 京都大学プレスリリース. 2015-12-03. |
著作権等: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
URI: | http://hdl.handle.net/2433/202081 |
DOI(出版社版): | 10.1038/ncomms10085 |
PubMed ID: | 26626042 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2015-12-03 |
出現コレクション: | 学術雑誌掲載論文等 |
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