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Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals
To overcome the drawbacks in three-dimensional (3D) perovskites, such as instability, surface hydration, and ion migration, recently researchers have focused on comparatively stable lower-dimensional perovskite derivatives. All-inorganic zero-dimensional (0D) perovskites (e.g., Cs(4)PbX(6); X = Cl(−...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9051410/ https://www.ncbi.nlm.nih.gov/pubmed/35493024 http://dx.doi.org/10.1039/d0ra00467g |
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author | Bhaumik, Saikat Bruno, Annalisa Mhaisalkar, Subodh |
author_facet | Bhaumik, Saikat Bruno, Annalisa Mhaisalkar, Subodh |
author_sort | Bhaumik, Saikat |
collection | PubMed |
description | To overcome the drawbacks in three-dimensional (3D) perovskites, such as instability, surface hydration, and ion migration, recently researchers have focused on comparatively stable lower-dimensional perovskite derivatives. All-inorganic zero-dimensional (0D) perovskites (e.g., Cs(4)PbX(6); X = Cl(−), Br(−), I(−)) can be evolved as a high performing material due to their larger exciton binding energy and better structural stability. The clear understanding of carrier recombination process in 0D perovskites is very important for better exploitation in light-emitting devices. In this work, we comprehensively studied the light emission process in 0D Cs(4)PbI(6) nanocrystals (NCs) and interestingly we observe intense white light emission at low temperatures. According to our experimental observations, we conclude that the white light emission contains an intrinsic exciton emission at 2.95 eV along with a broadband emission covering from 1.77 eV to 2.6 eV. We also confirm that the broadband emission is related to the carrier recombination of both self-trapped excitons (STE) and defect state trapped excitons. Our investigations reveal the carrier recombination processes in Cs(4)PbI(6) NCs and provide experimental guidelines for the potential application of white light generation. |
format | Online Article Text |
id | pubmed-9051410 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90514102022-04-29 Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals Bhaumik, Saikat Bruno, Annalisa Mhaisalkar, Subodh RSC Adv Chemistry To overcome the drawbacks in three-dimensional (3D) perovskites, such as instability, surface hydration, and ion migration, recently researchers have focused on comparatively stable lower-dimensional perovskite derivatives. All-inorganic zero-dimensional (0D) perovskites (e.g., Cs(4)PbX(6); X = Cl(−), Br(−), I(−)) can be evolved as a high performing material due to their larger exciton binding energy and better structural stability. The clear understanding of carrier recombination process in 0D perovskites is very important for better exploitation in light-emitting devices. In this work, we comprehensively studied the light emission process in 0D Cs(4)PbI(6) nanocrystals (NCs) and interestingly we observe intense white light emission at low temperatures. According to our experimental observations, we conclude that the white light emission contains an intrinsic exciton emission at 2.95 eV along with a broadband emission covering from 1.77 eV to 2.6 eV. We also confirm that the broadband emission is related to the carrier recombination of both self-trapped excitons (STE) and defect state trapped excitons. Our investigations reveal the carrier recombination processes in Cs(4)PbI(6) NCs and provide experimental guidelines for the potential application of white light generation. The Royal Society of Chemistry 2020-04-15 /pmc/articles/PMC9051410/ /pubmed/35493024 http://dx.doi.org/10.1039/d0ra00467g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Bhaumik, Saikat Bruno, Annalisa Mhaisalkar, Subodh Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals |
title | Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals |
title_full | Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals |
title_fullStr | Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals |
title_full_unstemmed | Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals |
title_short | Broadband emission from zero-dimensional Cs(4)PbI(6) perovskite nanocrystals |
title_sort | broadband emission from zero-dimensional cs(4)pbi(6) perovskite nanocrystals |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9051410/ https://www.ncbi.nlm.nih.gov/pubmed/35493024 http://dx.doi.org/10.1039/d0ra00467g |
work_keys_str_mv | AT bhaumiksaikat broadbandemissionfromzerodimensionalcs4pbi6perovskitenanocrystals AT brunoannalisa broadbandemissionfromzerodimensionalcs4pbi6perovskitenanocrystals AT mhaisalkarsubodh broadbandemissionfromzerodimensionalcs4pbi6perovskitenanocrystals |