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Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures

Relatively low efficiency is the bottleneck for the application of lanthanide‐doped upconversion nanoparticles (UCNPs). The high‐level doping strategy realized in recent years has not improved the efficiency as much as expected. It is argued that cross relaxation (CR) is not detrimental to upconvers...

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Autores principales: Tu, Langping, Wu, Kefan, Luo, Yongshi, Wang, Enhui, Yuan, Jun, Zuo, Jing, Zhou, Ding, Li, Bin, Zhou, Jiajia, Jin, Dayong, Zhang, Hong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10107519/
https://www.ncbi.nlm.nih.gov/pubmed/36511155
http://dx.doi.org/10.1002/anie.202217100
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author Tu, Langping
Wu, Kefan
Luo, Yongshi
Wang, Enhui
Yuan, Jun
Zuo, Jing
Zhou, Ding
Li, Bin
Zhou, Jiajia
Jin, Dayong
Zhang, Hong
author_facet Tu, Langping
Wu, Kefan
Luo, Yongshi
Wang, Enhui
Yuan, Jun
Zuo, Jing
Zhou, Ding
Li, Bin
Zhou, Jiajia
Jin, Dayong
Zhang, Hong
author_sort Tu, Langping
collection PubMed
description Relatively low efficiency is the bottleneck for the application of lanthanide‐doped upconversion nanoparticles (UCNPs). The high‐level doping strategy realized in recent years has not improved the efficiency as much as expected. It is argued that cross relaxation (CR) is not detrimental to upconversion. Here we combine theoretical simulation and spectroscopy to elucidate the role of CR in upconversion process of Er(3+) highly doped (HD) UCNPs. It is found that if CR is purposively suppressed, upconversion efficiency can be significantly improved. Specifically, we demonstrate experimentally that inhibition of CR by introducing cryogenic environment (40 K) enhances upconversion emission by more than two orders of magnitude. This work not only elucidates the nature of CR and its non‐negligible adverse effects, but also provides a new perspective for improving upconversion efficiency. The result can be directly applied to cryogenic imaging and wide range temperature sensing.
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spelling pubmed-101075192023-04-18 Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures Tu, Langping Wu, Kefan Luo, Yongshi Wang, Enhui Yuan, Jun Zuo, Jing Zhou, Ding Li, Bin Zhou, Jiajia Jin, Dayong Zhang, Hong Angew Chem Int Ed Engl Research Articles Relatively low efficiency is the bottleneck for the application of lanthanide‐doped upconversion nanoparticles (UCNPs). The high‐level doping strategy realized in recent years has not improved the efficiency as much as expected. It is argued that cross relaxation (CR) is not detrimental to upconversion. Here we combine theoretical simulation and spectroscopy to elucidate the role of CR in upconversion process of Er(3+) highly doped (HD) UCNPs. It is found that if CR is purposively suppressed, upconversion efficiency can be significantly improved. Specifically, we demonstrate experimentally that inhibition of CR by introducing cryogenic environment (40 K) enhances upconversion emission by more than two orders of magnitude. This work not only elucidates the nature of CR and its non‐negligible adverse effects, but also provides a new perspective for improving upconversion efficiency. The result can be directly applied to cryogenic imaging and wide range temperature sensing. John Wiley and Sons Inc. 2023-01-10 2023-02-06 /pmc/articles/PMC10107519/ /pubmed/36511155 http://dx.doi.org/10.1002/anie.202217100 Text en © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Research Articles
Tu, Langping
Wu, Kefan
Luo, Yongshi
Wang, Enhui
Yuan, Jun
Zuo, Jing
Zhou, Ding
Li, Bin
Zhou, Jiajia
Jin, Dayong
Zhang, Hong
Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures
title Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures
title_full Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures
title_fullStr Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures
title_full_unstemmed Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures
title_short Significant Enhancement of the Upconversion Emission in Highly Er(3+)‐Doped Nanoparticles at Cryogenic Temperatures
title_sort significant enhancement of the upconversion emission in highly er(3+)‐doped nanoparticles at cryogenic temperatures
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10107519/
https://www.ncbi.nlm.nih.gov/pubmed/36511155
http://dx.doi.org/10.1002/anie.202217100
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