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High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads
Self-assembled donor–acceptor dyads are used as model nanostructured heterojunctions for local investigations by noncontact atomic force microscopy (nc-AFM) and Kelvin probe force microscopy (KPFM). With the aim to probe the photo-induced charge carrier generation, thin films deposited on transparen...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4902083/ https://www.ncbi.nlm.nih.gov/pubmed/27335768 http://dx.doi.org/10.3762/bjnano.7.71 |
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author | Grévin, Benjamin Schwartz, Pierre-Olivier Biniek, Laure Brinkmann, Martin Leclerc, Nicolas Zaborova, Elena Méry, Stéphane |
author_facet | Grévin, Benjamin Schwartz, Pierre-Olivier Biniek, Laure Brinkmann, Martin Leclerc, Nicolas Zaborova, Elena Méry, Stéphane |
author_sort | Grévin, Benjamin |
collection | PubMed |
description | Self-assembled donor–acceptor dyads are used as model nanostructured heterojunctions for local investigations by noncontact atomic force microscopy (nc-AFM) and Kelvin probe force microscopy (KPFM). With the aim to probe the photo-induced charge carrier generation, thin films deposited on transparent indium tin oxide substrates are investigated in dark conditions and upon illumination. The topographic and contact potential difference (CPD) images taken under dark conditions are analysed in view of the results of complementary transmission electron microscopy (TEM) experiments. After in situ annealing, it is shown that the dyads with longer donor blocks essentially lead to standing acceptor–donor lamellae, where the acceptor and donor groups are π-stacked in an edge-on configuration. The existence of strong CPD and surface photo-voltage (SPV) contrasts shows that structural variations occur within the bulk of the edge-on stacks. SPV images with a very high lateral resolution are achieved, which allows for the resolution of local photo-charging contrasts at the scale of single edge-on lamella. This work paves the way for local investigations of the optoelectronic properties of donor–acceptor supramolecular architectures down to the elementary building block level. |
format | Online Article Text |
id | pubmed-4902083 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-49020832016-06-22 High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads Grévin, Benjamin Schwartz, Pierre-Olivier Biniek, Laure Brinkmann, Martin Leclerc, Nicolas Zaborova, Elena Méry, Stéphane Beilstein J Nanotechnol Full Research Paper Self-assembled donor–acceptor dyads are used as model nanostructured heterojunctions for local investigations by noncontact atomic force microscopy (nc-AFM) and Kelvin probe force microscopy (KPFM). With the aim to probe the photo-induced charge carrier generation, thin films deposited on transparent indium tin oxide substrates are investigated in dark conditions and upon illumination. The topographic and contact potential difference (CPD) images taken under dark conditions are analysed in view of the results of complementary transmission electron microscopy (TEM) experiments. After in situ annealing, it is shown that the dyads with longer donor blocks essentially lead to standing acceptor–donor lamellae, where the acceptor and donor groups are π-stacked in an edge-on configuration. The existence of strong CPD and surface photo-voltage (SPV) contrasts shows that structural variations occur within the bulk of the edge-on stacks. SPV images with a very high lateral resolution are achieved, which allows for the resolution of local photo-charging contrasts at the scale of single edge-on lamella. This work paves the way for local investigations of the optoelectronic properties of donor–acceptor supramolecular architectures down to the elementary building block level. Beilstein-Institut 2016-06-03 /pmc/articles/PMC4902083/ /pubmed/27335768 http://dx.doi.org/10.3762/bjnano.7.71 Text en Copyright © 2016, Grévin et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms) |
spellingShingle | Full Research Paper Grévin, Benjamin Schwartz, Pierre-Olivier Biniek, Laure Brinkmann, Martin Leclerc, Nicolas Zaborova, Elena Méry, Stéphane High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads |
title | High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads |
title_full | High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads |
title_fullStr | High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads |
title_full_unstemmed | High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads |
title_short | High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads |
title_sort | high-resolution noncontact afm and kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads |
topic | Full Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4902083/ https://www.ncbi.nlm.nih.gov/pubmed/27335768 http://dx.doi.org/10.3762/bjnano.7.71 |
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