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The influence of defects on the luminescence of trivalent terbium in nanocrystalline yttrium orthovanadate
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Perrella, R. V., Walker, Marc, Chamberlain, T. W., Walton, R. I. and de Sousa, P. C. (2022) The influence of defects on the luminescence of trivalent terbium in nanocrystalline yttrium orthovanadate. Nano Letters, 22 (9). pp. 3569-3575. doi:10.1021/acs.nanolett.1c04937
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WRAP-The-influence-of-defects-on-the-luminescence-of-trivalent-terbium-Walton-2022.pdf - Accepted Version - Requires a PDF viewer. Download (2388Kb) | Preview |
Official URL: https://doi.org/10.1021/acs.nanolett.1c04937
Abstract
Terbium-doped YVO4 has been considered a non-luminescent solid since the first classic studies on rare-earth-doped phosphors in the 1960s. However, we demonstrate that defect engineering of YVO4:Tb3+ nanoparticles overcomes the metal-metal charge transfer (MMCT) process which is responsible for the quenching of the Tb3+ luminescence. Tetragonal (Y1- xTbx)VO4 nanoparticles obtained by colloidal precipitation showed expanded unit cells, high defect densities, and intimately mixed carbonates and hydroxides, which contribute to a shift of the MMCT states to higher energies. Consequently, we demonstrate unambiguously for the first time that Tb3+ luminescence can be excited by VO4 3-Tb3+ energy transfer and by direct population of the 5D4 state in YVO4. We also discuss how thermal treatment removes these effects and shifts the quenching MMCT state to lower energies, thus highlighting the major consequences of defect density and microstructure in nanosized phosphors. Therefore, our findings ultimately show nanostructured YVO4:Tb3+can be reclassified as a UV-excitable luminescent material.
Item Type: | Journal Item | |||||||||||||||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Science > Physics |
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Library of Congress Subject Headings (LCSH): | Vanadates , Terbium , Rare earth metals, Luminescence , Nanocrystals , Colloidal crystals | |||||||||||||||||||||||||||
Journal or Publication Title: | Nano Letters | |||||||||||||||||||||||||||
Publisher: | American Chemical Society | |||||||||||||||||||||||||||
ISSN: | 1530-6984 | |||||||||||||||||||||||||||
Official Date: | 11 May 2022 | |||||||||||||||||||||||||||
Dates: |
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Volume: | 22 | |||||||||||||||||||||||||||
Number: | 9 | |||||||||||||||||||||||||||
Number of Pages: | 30 | |||||||||||||||||||||||||||
Page Range: | pp. 3569-3575 | |||||||||||||||||||||||||||
DOI: | 10.1021/acs.nanolett.1c04937 | |||||||||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||||||||
Reuse Statement (publisher, data, author rights): | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.1c04937 | |||||||||||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||
Copyright Holders: | American Chemical Society | |||||||||||||||||||||||||||
Date of first compliant deposit: | 19 April 2022 | |||||||||||||||||||||||||||
Date of first compliant Open Access: | 19 April 2023 | |||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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