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Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy
Hybrid organic–inorganic perovskites are emerging semiconductors for cheap and efficient photovoltaics and light-emitting devices. Different from conventional inorganic semiconductors, hybrid perovskites consist of coexisting organic and inorganic sub-lattices, which present disparate atomic masses...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052157/ https://www.ncbi.nlm.nih.gov/pubmed/30022022 http://dx.doi.org/10.1038/s41467-018-05015-9 |
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author | Guo, Peijun Gong, Jue Sadasivam, Sridhar Xia, Yi Song, Tze-Bin Diroll, Benjamin T. Stoumpos, Constantinos C. Ketterson, John B. Kanatzidis, Mercouri G. Chan, Maria K. Y. Darancet, Pierre Xu, Tao Schaller, Richard D. |
author_facet | Guo, Peijun Gong, Jue Sadasivam, Sridhar Xia, Yi Song, Tze-Bin Diroll, Benjamin T. Stoumpos, Constantinos C. Ketterson, John B. Kanatzidis, Mercouri G. Chan, Maria K. Y. Darancet, Pierre Xu, Tao Schaller, Richard D. |
author_sort | Guo, Peijun |
collection | PubMed |
description | Hybrid organic–inorganic perovskites are emerging semiconductors for cheap and efficient photovoltaics and light-emitting devices. Different from conventional inorganic semiconductors, hybrid perovskites consist of coexisting organic and inorganic sub-lattices, which present disparate atomic masses and bond strengths. The nanoscopic interpenetration of these disparate components, which lack strong electronic and vibrational coupling, presents fundamental challenges to the understanding of charge and heat dissipation. Here we study phonon population and equilibration processes in methylammonium lead iodide (MAPbI(3)) by transiently probing the vibrational modes of the organic sub-lattice following above-bandgap optical excitation. We observe inter-sub-lattice thermal equilibration on timescales ranging from hundreds of picoseconds to a couple of nanoseconds. As supported by a two-temperature model based on first-principles calculations, the slow thermal equilibration is attributable to the sequential phonon populations of the inorganic and organic sub-lattices, respectively. The observed long-lasting thermal non-equilibrium offers insights into thermal transport and heat management of the emergent hybrid material class. |
format | Online Article Text |
id | pubmed-6052157 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-60521572018-07-23 Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy Guo, Peijun Gong, Jue Sadasivam, Sridhar Xia, Yi Song, Tze-Bin Diroll, Benjamin T. Stoumpos, Constantinos C. Ketterson, John B. Kanatzidis, Mercouri G. Chan, Maria K. Y. Darancet, Pierre Xu, Tao Schaller, Richard D. Nat Commun Article Hybrid organic–inorganic perovskites are emerging semiconductors for cheap and efficient photovoltaics and light-emitting devices. Different from conventional inorganic semiconductors, hybrid perovskites consist of coexisting organic and inorganic sub-lattices, which present disparate atomic masses and bond strengths. The nanoscopic interpenetration of these disparate components, which lack strong electronic and vibrational coupling, presents fundamental challenges to the understanding of charge and heat dissipation. Here we study phonon population and equilibration processes in methylammonium lead iodide (MAPbI(3)) by transiently probing the vibrational modes of the organic sub-lattice following above-bandgap optical excitation. We observe inter-sub-lattice thermal equilibration on timescales ranging from hundreds of picoseconds to a couple of nanoseconds. As supported by a two-temperature model based on first-principles calculations, the slow thermal equilibration is attributable to the sequential phonon populations of the inorganic and organic sub-lattices, respectively. The observed long-lasting thermal non-equilibrium offers insights into thermal transport and heat management of the emergent hybrid material class. Nature Publishing Group UK 2018-07-18 /pmc/articles/PMC6052157/ /pubmed/30022022 http://dx.doi.org/10.1038/s41467-018-05015-9 Text en © The Author(s) 2018 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 Guo, Peijun Gong, Jue Sadasivam, Sridhar Xia, Yi Song, Tze-Bin Diroll, Benjamin T. Stoumpos, Constantinos C. Ketterson, John B. Kanatzidis, Mercouri G. Chan, Maria K. Y. Darancet, Pierre Xu, Tao Schaller, Richard D. Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy |
title | Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy |
title_full | Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy |
title_fullStr | Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy |
title_full_unstemmed | Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy |
title_short | Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy |
title_sort | slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6052157/ https://www.ncbi.nlm.nih.gov/pubmed/30022022 http://dx.doi.org/10.1038/s41467-018-05015-9 |
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