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Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals
The all-inorganic perovskite nanocrystals are currently in the research spotlight owing to their physical stability and superior optical properties—these features make them interesting for optoelectronic and photovoltaic applications. Here, we report on the observation of highly efficient carrier mu...
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/PMC6180104/ https://www.ncbi.nlm.nih.gov/pubmed/30305623 http://dx.doi.org/10.1038/s41467-018-06721-0 |
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author | de Weerd, Chris Gomez, Leyre Capretti, Antonio Lebrun, Delphine M. Matsubara, Eiichi Lin, Junhao Ashida, Masaaki Spoor, Frank C. M. Siebbeles, Laurens D. A. Houtepen, Arjan J. Suenaga, Kazutomo Fujiwara, Yasufumi Gregorkiewicz, Tom |
author_facet | de Weerd, Chris Gomez, Leyre Capretti, Antonio Lebrun, Delphine M. Matsubara, Eiichi Lin, Junhao Ashida, Masaaki Spoor, Frank C. M. Siebbeles, Laurens D. A. Houtepen, Arjan J. Suenaga, Kazutomo Fujiwara, Yasufumi Gregorkiewicz, Tom |
author_sort | de Weerd, Chris |
collection | PubMed |
description | The all-inorganic perovskite nanocrystals are currently in the research spotlight owing to their physical stability and superior optical properties—these features make them interesting for optoelectronic and photovoltaic applications. Here, we report on the observation of highly efficient carrier multiplication in colloidal CsPbI(3) nanocrystals prepared by a hot-injection method. The carrier multiplication process counteracts thermalization of hot carriers and as such provides the potential to increase the conversion efficiency of solar cells. We demonstrate that carrier multiplication commences at the threshold excitation energy near the energy conservation limit of twice the band gap, and has step-like characteristics with an extremely high quantum yield of up to 98%. Using ultrahigh temporal resolution, we show that carrier multiplication induces a longer build-up of the free carrier concentration, thus providing important insights into the physical mechanism responsible for this phenomenon. The evidence is obtained using three independent experimental approaches, and is conclusive. |
format | Online Article Text |
id | pubmed-6180104 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-61801042018-10-15 Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals de Weerd, Chris Gomez, Leyre Capretti, Antonio Lebrun, Delphine M. Matsubara, Eiichi Lin, Junhao Ashida, Masaaki Spoor, Frank C. M. Siebbeles, Laurens D. A. Houtepen, Arjan J. Suenaga, Kazutomo Fujiwara, Yasufumi Gregorkiewicz, Tom Nat Commun Article The all-inorganic perovskite nanocrystals are currently in the research spotlight owing to their physical stability and superior optical properties—these features make them interesting for optoelectronic and photovoltaic applications. Here, we report on the observation of highly efficient carrier multiplication in colloidal CsPbI(3) nanocrystals prepared by a hot-injection method. The carrier multiplication process counteracts thermalization of hot carriers and as such provides the potential to increase the conversion efficiency of solar cells. We demonstrate that carrier multiplication commences at the threshold excitation energy near the energy conservation limit of twice the band gap, and has step-like characteristics with an extremely high quantum yield of up to 98%. Using ultrahigh temporal resolution, we show that carrier multiplication induces a longer build-up of the free carrier concentration, thus providing important insights into the physical mechanism responsible for this phenomenon. The evidence is obtained using three independent experimental approaches, and is conclusive. Nature Publishing Group UK 2018-10-10 /pmc/articles/PMC6180104/ /pubmed/30305623 http://dx.doi.org/10.1038/s41467-018-06721-0 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 de Weerd, Chris Gomez, Leyre Capretti, Antonio Lebrun, Delphine M. Matsubara, Eiichi Lin, Junhao Ashida, Masaaki Spoor, Frank C. M. Siebbeles, Laurens D. A. Houtepen, Arjan J. Suenaga, Kazutomo Fujiwara, Yasufumi Gregorkiewicz, Tom Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals |
title | Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals |
title_full | Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals |
title_fullStr | Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals |
title_full_unstemmed | Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals |
title_short | Efficient carrier multiplication in CsPbI(3) perovskite nanocrystals |
title_sort | efficient carrier multiplication in cspbi(3) perovskite nanocrystals |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180104/ https://www.ncbi.nlm.nih.gov/pubmed/30305623 http://dx.doi.org/10.1038/s41467-018-06721-0 |
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