このアイテムのアクセス数: 57
このアイテムのファイル:
| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| s43246-022-00300-z.pdf | 1.12 MB | Adobe PDF | 見る/開く |
| タイトル: | Triplet sensitization via charge recombination at organic heterojunction for efficient near-infrared to visible solid-state photon upconversion |
| 著者: | Sakamoto, Yuji Izawa, Seiichiro Ohkita, Hideo    https://orcid.org/0000-0002-7403-3492 (unconfirmed)Hiramoto, Masahiro Tamai, Yasunari |
| 著者名の別形: | 坂本, 雄治 大北, 英生 玉井, 康成 |
| キーワード: | Lasers, LEDs and light sources Materials for devices Solar cells |
| 発行日: | 18-Oct-2022 |
| 出版者: | Springer Nature |
| 誌名: | Communications Materials |
| 巻: | 3 |
| 論文番号: | 76 |
| 抄録: | Realizing efficient near-infrared to visible photon upconversion in the solid state is pivotal for commercial applications in various fields. We previously reported a solid-state upconversion device which imitated the photovoltaic conversion mechanisms of organic solar cells. This leads to a significant improvement of up to 2.3% in the external quantum efficiency, which is two orders of magnitude higher than that of conventional devices. Here, we investigate the upconversion mechanism of this device. We examine exciton and charge dynamics using transient absorption spectroscopy and find that approximately 67% of incident photons are utilized owing to fast singlet exciton diffusion in the nonfullerene acceptor layer. Strikingly, triplet excitons are accumulated near the donor/acceptor interface, enabling accelerated triplet–triplet annihilation by a factor of more than 10. |
| 著作権等: | © The Author(s) 2022 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. |
| URI: | http://hdl.handle.net/2433/286215 |
| DOI(出版社版): | 10.1038/s43246-022-00300-z |
| 出現コレクション: | 学術雑誌掲載論文等 |
このアイテムは次のライセンスが設定されています: クリエイティブ・コモンズ・ライセンス
