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Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes
Charge separation dynamics after the absorption of a photon is a fundamental process relevant both for photosynthetic reaction centers and artificial solar conversion devices. It has been proposed that quantum coherence plays a role in the formation of charge carriers in organic photovoltaics, but e...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6992633/ https://www.ncbi.nlm.nih.gov/pubmed/32001688 http://dx.doi.org/10.1038/s41467-020-14476-w |
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author | Bian, Qingzhen Ma, Fei Chen, Shula Wei, Qi Su, Xiaojun Buyanova, Irina A. Chen, Weimin M. Ponseca, Carlito S. Linares, Mathieu Karki, Khadga J. Yartsev, Arkady Inganäs, Olle |
author_facet | Bian, Qingzhen Ma, Fei Chen, Shula Wei, Qi Su, Xiaojun Buyanova, Irina A. Chen, Weimin M. Ponseca, Carlito S. Linares, Mathieu Karki, Khadga J. Yartsev, Arkady Inganäs, Olle |
author_sort | Bian, Qingzhen |
collection | PubMed |
description | Charge separation dynamics after the absorption of a photon is a fundamental process relevant both for photosynthetic reaction centers and artificial solar conversion devices. It has been proposed that quantum coherence plays a role in the formation of charge carriers in organic photovoltaics, but experimental proofs have been lacking. Here we report experimental evidence of coherence in the charge separation process in organic donor/acceptor heterojunctions, in the form of low frequency oscillatory signature in the kinetics of the transient absorption and nonlinear two-dimensional photocurrent spectroscopy. The coherence plays a decisive role in the initial ~200 femtoseconds as we observe distinct experimental signatures of coherent photocurrent generation. This coherent process breaks the energy barrier limitation for charge formation, thus competing with excitation energy transfer. The physics may inspire the design of new photovoltaic materials with high device performance, which explore the quantum effects in the next-generation optoelectronic applications. |
format | Online Article Text |
id | pubmed-6992633 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-69926332020-02-03 Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes Bian, Qingzhen Ma, Fei Chen, Shula Wei, Qi Su, Xiaojun Buyanova, Irina A. Chen, Weimin M. Ponseca, Carlito S. Linares, Mathieu Karki, Khadga J. Yartsev, Arkady Inganäs, Olle Nat Commun Article Charge separation dynamics after the absorption of a photon is a fundamental process relevant both for photosynthetic reaction centers and artificial solar conversion devices. It has been proposed that quantum coherence plays a role in the formation of charge carriers in organic photovoltaics, but experimental proofs have been lacking. Here we report experimental evidence of coherence in the charge separation process in organic donor/acceptor heterojunctions, in the form of low frequency oscillatory signature in the kinetics of the transient absorption and nonlinear two-dimensional photocurrent spectroscopy. The coherence plays a decisive role in the initial ~200 femtoseconds as we observe distinct experimental signatures of coherent photocurrent generation. This coherent process breaks the energy barrier limitation for charge formation, thus competing with excitation energy transfer. The physics may inspire the design of new photovoltaic materials with high device performance, which explore the quantum effects in the next-generation optoelectronic applications. Nature Publishing Group UK 2020-01-30 /pmc/articles/PMC6992633/ /pubmed/32001688 http://dx.doi.org/10.1038/s41467-020-14476-w Text en © The Author(s) 2020 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 Bian, Qingzhen Ma, Fei Chen, Shula Wei, Qi Su, Xiaojun Buyanova, Irina A. Chen, Weimin M. Ponseca, Carlito S. Linares, Mathieu Karki, Khadga J. Yartsev, Arkady Inganäs, Olle Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes |
title | Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes |
title_full | Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes |
title_fullStr | Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes |
title_full_unstemmed | Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes |
title_short | Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes |
title_sort | vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6992633/ https://www.ncbi.nlm.nih.gov/pubmed/32001688 http://dx.doi.org/10.1038/s41467-020-14476-w |
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