Unraveling the superior role of dicarboxylic acids as surface chelators in Eu3+-doped yttrium fluorides: A systematic modulation of the crystal phases and morphologies for highly tuned optical performance
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comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
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Title
Unraveling the superior role of dicarboxylic acids as surface chelators in Eu3+-doped yttrium fluorides: A systematic modulation of the crystal phases and morphologies for highly tuned optical performanceDate
2021-06-16Publisher
ElsevierISSN
0925-8388Bibliographic citation
SERNA-GALLÉN, Pablo; BELTRÁN-MIR, Héctor; CORDONCILLO, Eloísa. Unraveling the superior role of dicarboxylic acids as surface chelators in Eu3+-doped yttrium fluorides: a systematic modulation of the crystal phases and morphologies for highly tuned optical performance. Journal of Alloys and Compounds, 2021, p. 160847.Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/journal/journal-of-alloys-and-compoundsVersion
info:eu-repo/semantics/acceptedVersionSubject
Abstract
Eu3+-doped YF3 and KY3F10 phosphors have been prepared hydrothermally in a wide range of pH values without the use of surface chelators and adding oxalic or tartaric acid. We have proved, for the first time, the ... [+]
Eu3+-doped YF3 and KY3F10 phosphors have been prepared hydrothermally in a wide range of pH values without the use of surface chelators and adding oxalic or tartaric acid. We have proved, for the first time, the usefulness of dicarboxylic acids to modulate the evolution of the surface and crystal phases in the KF-YF3 system. The morphologies and crystal structures of the materials displayed a critical dependence on the pH and the chelator employed, and a plausible mechanism to explain the differences among the distinct series of samples is proposed. As a result, the fluorides exhibited outstanding and tunable photoluminescence, with extremely high quantum efficiencies and very long lifetimes. The asymmetry ratio and Judd-Ofelt parameters calculations allowed us to establish a relationship between the optical performance of the compounds and their physicochemical properties. We feel that this study can arouse widespread interest within the materials engineering community, since similar procedures could be implemented to the extended family of complex yttrium/lanthanide fluorides for advanced applications in important fields such as bioanalytics, biomedics, or photonics. Indeed, the materials in the present work, with orangish-yellow colored emissions, could be very interesting for application in white light emitting diodes through their combination with blue chips. [-]
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Journal of Alloys and Compounds Volume 883, 25 November 2021, 160847Funder Name
Universitat Jaume I | Ministerio de Economía y Competitividad
Project code
UJI-B2019-41 | MAT2016-80410-P
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0925-8388/© 2021 Elsevier B.V. All rights reserved.
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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