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Probing the ionic defect landscape in halide perovskite solar cells
Point defects in metal halide perovskites play a critical role in determining their properties and optoelectronic performance; however, many open questions remain unanswered. In this work, we apply impedance spectroscopy and deep-level transient spectroscopy to characterize the ionic defect landscap...
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/PMC7705665/ https://www.ncbi.nlm.nih.gov/pubmed/33257707 http://dx.doi.org/10.1038/s41467-020-19769-8 |
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author | Reichert, Sebastian An, Qingzhi Woo, Young-Won Walsh, Aron Vaynzof, Yana Deibel, Carsten |
author_facet | Reichert, Sebastian An, Qingzhi Woo, Young-Won Walsh, Aron Vaynzof, Yana Deibel, Carsten |
author_sort | Reichert, Sebastian |
collection | PubMed |
description | Point defects in metal halide perovskites play a critical role in determining their properties and optoelectronic performance; however, many open questions remain unanswered. In this work, we apply impedance spectroscopy and deep-level transient spectroscopy to characterize the ionic defect landscape in methylammonium lead triiodide (MAPbI(3)) perovskites in which defects were purposely introduced by fractionally changing the precursor stoichiometry. Our results highlight the profound influence of defects on the electronic landscape, exemplified by their impact on the device built-in potential, and consequently, the open-circuit voltage. Even low ion densities can have an impact on the electronic landscape when both cations and anions are considered as mobile. Moreover, we find that all measured ionic defects fulfil the Meyer–Neldel rule with a characteristic energy connected to the underlying ion hopping process. These findings support a general categorization of defects in halide perovskite compounds. |
format | Online Article Text |
id | pubmed-7705665 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-77056652020-12-03 Probing the ionic defect landscape in halide perovskite solar cells Reichert, Sebastian An, Qingzhi Woo, Young-Won Walsh, Aron Vaynzof, Yana Deibel, Carsten Nat Commun Article Point defects in metal halide perovskites play a critical role in determining their properties and optoelectronic performance; however, many open questions remain unanswered. In this work, we apply impedance spectroscopy and deep-level transient spectroscopy to characterize the ionic defect landscape in methylammonium lead triiodide (MAPbI(3)) perovskites in which defects were purposely introduced by fractionally changing the precursor stoichiometry. Our results highlight the profound influence of defects on the electronic landscape, exemplified by their impact on the device built-in potential, and consequently, the open-circuit voltage. Even low ion densities can have an impact on the electronic landscape when both cations and anions are considered as mobile. Moreover, we find that all measured ionic defects fulfil the Meyer–Neldel rule with a characteristic energy connected to the underlying ion hopping process. These findings support a general categorization of defects in halide perovskite compounds. Nature Publishing Group UK 2020-11-30 /pmc/articles/PMC7705665/ /pubmed/33257707 http://dx.doi.org/10.1038/s41467-020-19769-8 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 Reichert, Sebastian An, Qingzhi Woo, Young-Won Walsh, Aron Vaynzof, Yana Deibel, Carsten Probing the ionic defect landscape in halide perovskite solar cells |
title | Probing the ionic defect landscape in halide perovskite solar cells |
title_full | Probing the ionic defect landscape in halide perovskite solar cells |
title_fullStr | Probing the ionic defect landscape in halide perovskite solar cells |
title_full_unstemmed | Probing the ionic defect landscape in halide perovskite solar cells |
title_short | Probing the ionic defect landscape in halide perovskite solar cells |
title_sort | probing the ionic defect landscape in halide perovskite solar cells |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7705665/ https://www.ncbi.nlm.nih.gov/pubmed/33257707 http://dx.doi.org/10.1038/s41467-020-19769-8 |
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