Power-Dependent Optimal Concentrations of Tm3+ and Yb3+ in Upconversion Nanoparticles.

Wen, S; Li, D; Liu, Y; Chen, C; Wang, F; Zhou, J; Bao, G; Zhang, L; Jin, D

Power-Dependent Optimal Concentrations of Tm3+ and Yb3+ in Upconversion Nanoparticles.

Wen, S

Li, D Liu, Y Chen, C

Wang, F

Zhou, J

Bao, G

Zhang, L Jin, D

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: J Phys Chem Lett, 2022, 13, (23), pp. 5316-5323
Issue Date:: 2022-06-08

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Field	Value	Language
dc.contributor.author	Wen, S https://orcid.org/0000-0002-4670-4658
dc.contributor.author	Li, D
dc.contributor.author	Liu, Y
dc.contributor.author	Chen, C https://orcid.org/0000-0003-4620-7771
dc.contributor.author	Wang, F https://orcid.org/0000-0001-7403-3305
dc.contributor.author	Zhou, J https://orcid.org/0000-0002-0605-5745
dc.contributor.author	Bao, G https://orcid.org/0000-0001-5103-5009
dc.contributor.author	Zhang, L
dc.contributor.author	Jin, D https://orcid.org/0000-0003-1046-2666
dc.date.accessioned	2023-01-30T04:05:07Z
dc.date.available	2023-01-30T04:05:07Z
dc.date.issued	2022-06-08
dc.identifier.citation	J Phys Chem Lett, 2022, 13, (23), pp. 5316-5323
dc.identifier.issn	1948-7185
dc.identifier.issn	1948-7185
dc.identifier.uri	http://hdl.handle.net/10453/165588
dc.description.abstract	Lanthanide-doped upconversion nanoparticles (UCNPs) have enabled a broad range of emerging nanophotonics and biophotonics applications. Here, we provide a quantitative guide to the optimum concentrations of Yb3+ sensitizer and Tm3+ emitter ions, highly dependent on the excitation power densities. To achieve this, we fabricate the inert-core@active-shell@inert-shell architecture to sandwich the same volume of the optically active section. Our results show that highly doped UCNPs enable an approximately 18-fold enhancement in brightness over that of conventional ones. Increasing the Tm3+ concentration improves the brightness by 6 times and increases the NIR/blue ratio by 11 times, while the increase of Yb3+ concentration enhances the brightness by 3 times and only slightly affects the NIR/blue ratio. Moreover, the optimal doping concentration of Tm3+ varies from 2% to 16%, which is highly dependent on the excitation power density ranging from 102 to 107 W/cm2. This work provides a guideline for designing bright UCNPs under different excitation conditions.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER CHEMICAL SOC
dc.relation	National Natural Science Foundation of China61729501
dc.relation	http://purl.org/au-research/grants/arc/DE220100846
dc.relation	http://purl.org/au-research/grants/arc/FL210100180
dc.relation.ispartof	J Phys Chem Lett
dc.relation.isbasedon	10.1021/acs.jpclett.2c01186
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences
dc.title	Power-Dependent Optimal Concentrations of Tm3+ and Yb3+ in Upconversion Nanoparticles.
dc.type	Journal Article
utslib.citation.volume	13
utslib.location.activity	United States
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
utslib.copyright.status	closed_access	*
dc.date.updated	2023-01-30T04:05:05Z
pubs.issue	23
pubs.publication-status	Published online
pubs.volume	13
utslib.citation.issue	23

Abstract:

Lanthanide-doped upconversion nanoparticles (UCNPs) have enabled a broad range of emerging nanophotonics and biophotonics applications. Here, we provide a quantitative guide to the optimum concentrations of Yb3+ sensitizer and Tm3+ emitter ions, highly dependent on the excitation power densities. To achieve this, we fabricate the inert-core@active-shell@inert-shell architecture to sandwich the same volume of the optically active section. Our results show that highly doped UCNPs enable an approximately 18-fold enhancement in brightness over that of conventional ones. Increasing the Tm3+ concentration improves the brightness by 6 times and increases the NIR/blue ratio by 11 times, while the increase of Yb3+ concentration enhances the brightness by 3 times and only slightly affects the NIR/blue ratio. Moreover, the optimal doping concentration of Tm3+ varies from 2% to 16%, which is highly dependent on the excitation power density ranging from 102 to 107 W/cm2. This work provides a guideline for designing bright UCNPs under different excitation conditions.

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http://hdl.handle.net/10453/165588