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Understanding the Stability of MAPbBr(3) versus MAPbI(3): Suppression of Methylammonium Migration and Reduction of Halide Migration
[Image: see text] Solar cells based on metal halide perovskites often show excellent efficiency but poor stability. This degradation of perovskite devices has been associated with the migration of mobile ions. MAPbBr(3) perovskite materials are significantly more stable under ambient conditions than...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7476026/ https://www.ncbi.nlm.nih.gov/pubmed/32787314 http://dx.doi.org/10.1021/acs.jpclett.0c01822 |
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author | McGovern, Lucie Futscher, Moritz H. Muscarella, Loreta A. Ehrler, Bruno |
author_facet | McGovern, Lucie Futscher, Moritz H. Muscarella, Loreta A. Ehrler, Bruno |
author_sort | McGovern, Lucie |
collection | PubMed |
description | [Image: see text] Solar cells based on metal halide perovskites often show excellent efficiency but poor stability. This degradation of perovskite devices has been associated with the migration of mobile ions. MAPbBr(3) perovskite materials are significantly more stable under ambient conditions than MAPbI(3) perovskite materials. In this work, we use transient ion drift to quantify the key characteristics of ion migration in MAPbBr(3) perovskite solar cells. We then proceed to compare them with those of MAPbI(3) perovskite solar cells. We find that in MAPbBr(3), bromide migration is the main process at play and that contrary to the case of MAPbI(3), there is no evidence for methylammonium migration. Quantitatively, we find a reduced activation energy, a reduced diffusion coefficient, and a reduced concentration for halide ions in MAPbBr(3) compared to MAPbI(3). Understanding this difference in mobile ion migration is a crucial step in understanding the enhanced stability of MAPbBr(3) versus MAPbI(3). |
format | Online Article Text |
id | pubmed-7476026 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-74760262020-09-08 Understanding the Stability of MAPbBr(3) versus MAPbI(3): Suppression of Methylammonium Migration and Reduction of Halide Migration McGovern, Lucie Futscher, Moritz H. Muscarella, Loreta A. Ehrler, Bruno J Phys Chem Lett [Image: see text] Solar cells based on metal halide perovskites often show excellent efficiency but poor stability. This degradation of perovskite devices has been associated with the migration of mobile ions. MAPbBr(3) perovskite materials are significantly more stable under ambient conditions than MAPbI(3) perovskite materials. In this work, we use transient ion drift to quantify the key characteristics of ion migration in MAPbBr(3) perovskite solar cells. We then proceed to compare them with those of MAPbI(3) perovskite solar cells. We find that in MAPbBr(3), bromide migration is the main process at play and that contrary to the case of MAPbI(3), there is no evidence for methylammonium migration. Quantitatively, we find a reduced activation energy, a reduced diffusion coefficient, and a reduced concentration for halide ions in MAPbBr(3) compared to MAPbI(3). Understanding this difference in mobile ion migration is a crucial step in understanding the enhanced stability of MAPbBr(3) versus MAPbI(3). American Chemical Society 2020-08-07 2020-09-03 /pmc/articles/PMC7476026/ /pubmed/32787314 http://dx.doi.org/10.1021/acs.jpclett.0c01822 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | McGovern, Lucie Futscher, Moritz H. Muscarella, Loreta A. Ehrler, Bruno Understanding the Stability of MAPbBr(3) versus MAPbI(3): Suppression of Methylammonium Migration and Reduction of Halide Migration |
title | Understanding the Stability of MAPbBr(3) versus
MAPbI(3): Suppression of Methylammonium Migration and Reduction
of Halide Migration |
title_full | Understanding the Stability of MAPbBr(3) versus
MAPbI(3): Suppression of Methylammonium Migration and Reduction
of Halide Migration |
title_fullStr | Understanding the Stability of MAPbBr(3) versus
MAPbI(3): Suppression of Methylammonium Migration and Reduction
of Halide Migration |
title_full_unstemmed | Understanding the Stability of MAPbBr(3) versus
MAPbI(3): Suppression of Methylammonium Migration and Reduction
of Halide Migration |
title_short | Understanding the Stability of MAPbBr(3) versus
MAPbI(3): Suppression of Methylammonium Migration and Reduction
of Halide Migration |
title_sort | understanding the stability of mapbbr(3) versus
mapbi(3): suppression of methylammonium migration and reduction
of halide migration |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7476026/ https://www.ncbi.nlm.nih.gov/pubmed/32787314 http://dx.doi.org/10.1021/acs.jpclett.0c01822 |
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