Anatomy of the energetic driving force for charge generation in organic solar cells
Eliminating the excess energetic driving force in organic solar cells leads to a smaller energy loss and higher device performance; hence, it is vital to understand the relation between the interfacial energetics and the photoelectric conversion efficiency. In this study, we systematically investiga...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6555791/ https://www.ncbi.nlm.nih.gov/pubmed/31175294 http://dx.doi.org/10.1038/s41467-019-10434-3 |
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author | Nakano, Kyohei Chen, Yujiao Xiao, Bo Han, Weining Huang, Jianming Yoshida, Hiroyuki Zhou, Erjun Tajima, Keisuke |
author_facet | Nakano, Kyohei Chen, Yujiao Xiao, Bo Han, Weining Huang, Jianming Yoshida, Hiroyuki Zhou, Erjun Tajima, Keisuke |
author_sort | Nakano, Kyohei |
collection | PubMed |
description | Eliminating the excess energetic driving force in organic solar cells leads to a smaller energy loss and higher device performance; hence, it is vital to understand the relation between the interfacial energetics and the photoelectric conversion efficiency. In this study, we systematically investigate 16 combinations of four donor polymers and four acceptors in planar heterojunction. The charge generation efficiency and its electric field dependence correlate with the energy difference between the singlet excited state and the interfacial charge transfer state. The threshold energy difference is 0.2 to 0.3 eV, below which the efficiency starts dropping and the charge generation becomes electric field-dependent. In contrast, the charge generation efficiency does not correlate with the energy difference between the charge transfer and the charge-separated states, indicating that the binding of the charge pairs in the charge transfer state is not the determining factor for the charge generation. |
format | Online Article Text |
id | pubmed-6555791 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-65557912019-06-21 Anatomy of the energetic driving force for charge generation in organic solar cells Nakano, Kyohei Chen, Yujiao Xiao, Bo Han, Weining Huang, Jianming Yoshida, Hiroyuki Zhou, Erjun Tajima, Keisuke Nat Commun Article Eliminating the excess energetic driving force in organic solar cells leads to a smaller energy loss and higher device performance; hence, it is vital to understand the relation between the interfacial energetics and the photoelectric conversion efficiency. In this study, we systematically investigate 16 combinations of four donor polymers and four acceptors in planar heterojunction. The charge generation efficiency and its electric field dependence correlate with the energy difference between the singlet excited state and the interfacial charge transfer state. The threshold energy difference is 0.2 to 0.3 eV, below which the efficiency starts dropping and the charge generation becomes electric field-dependent. In contrast, the charge generation efficiency does not correlate with the energy difference between the charge transfer and the charge-separated states, indicating that the binding of the charge pairs in the charge transfer state is not the determining factor for the charge generation. Nature Publishing Group UK 2019-06-07 /pmc/articles/PMC6555791/ /pubmed/31175294 http://dx.doi.org/10.1038/s41467-019-10434-3 Text en © The Author(s) 2019 Open Access 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. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Nakano, Kyohei Chen, Yujiao Xiao, Bo Han, Weining Huang, Jianming Yoshida, Hiroyuki Zhou, Erjun Tajima, Keisuke Anatomy of the energetic driving force for charge generation in organic solar cells |
title | Anatomy of the energetic driving force for charge generation in organic solar cells |
title_full | Anatomy of the energetic driving force for charge generation in organic solar cells |
title_fullStr | Anatomy of the energetic driving force for charge generation in organic solar cells |
title_full_unstemmed | Anatomy of the energetic driving force for charge generation in organic solar cells |
title_short | Anatomy of the energetic driving force for charge generation in organic solar cells |
title_sort | anatomy of the energetic driving force for charge generation in organic solar cells |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6555791/ https://www.ncbi.nlm.nih.gov/pubmed/31175294 http://dx.doi.org/10.1038/s41467-019-10434-3 |
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