Up-Converting Lanthanide-Doped YAG Nanospheres
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Up-Converting Lanthanide-Doped YAG NanospheresAutoria
Data de publicació
2020-08-07Editor
Frontiers MediaCita bibliogràfica
VALLÉS-PELARDA, Marta, et al. Up-converting Lanthanide-doped YAG Nanospheres. Frontiers in Materials, 2020, vol. 7, p. 273.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.frontiersin.org/articles/10.3389/fmats.2020.00273/fullVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
The development of lanthanide-doped Y3Al5O12 (Ln:YAG) garnet nanostructures is
a hot topic in the field of inorganic nanophosphors due to the current interest
in developing small nanoparticles for solid-state lighting ... [+]
The development of lanthanide-doped Y3Al5O12 (Ln:YAG) garnet nanostructures is
a hot topic in the field of inorganic nanophosphors due to the current interest
in developing small nanoparticles for solid-state lighting (SSL), displays, lasers and
scintillation applications. In this study, we report the preparation of homogeneous
Ln:YAG (Ln: Ho/Yb ions) nanospheres through a combined two-steps coprecipitationsolvothermal synthesis at low temperature. The crystal growth takes place in ethylene
glycol, which is an inexpensive, non-toxic and easily available solvent. Monodisperse
and crystalline spherical YAG particles of 80 nm in diameter were obtained. Furthermore,
the protocol can be extended to other compositions (Tb/Yb, Tm/Yb. . .) to explore
different luminescent properties, without affecting the morphology of the material,
indicating the robustness and practical utility of the reported methodology. Thermal
treatment of the nanogarnets at 1200◦C is necessary for making materials optically
active upon both UV and NIR excitation. The spherical morphology of annealed samples
is preserved, what helps their further dispersion in solvents, barbotines, inks or printing
vehicles. The lanthanide-doped nanogarnets exhibited the characteristic blue, green
and red emissions from lanthanide upconversion photoluminescence (UCPL) upon NIR
excitation. The UCPL mechanism was studied and CIE chromate coordinates were
obtained. These nanogarnets were further evaluated as functional ceramic phosphors
by incorporating them into commercial glazes. The materials exhibited an exceptional
chemical stability in a harsh medium such as a fused glaze. Consequently, the visible
emissions of the nanoparticles were transferred to the whole glass matrix, thus providing
a functional glaze that emits intense blue and green light upon NIR excitation. These
luminescent nanogarnets have promising applications in smart enamels, but can
also be useful for lighting displays (white LEDs. . .), smart paintings or plastics, and
anti-counterfeiting systems. [-]
Publicat a
Frontiers in Materials (2020), v. 7Proyecto de investigación
1) European Research Council (ERC) via Consolidator Grant (724424-No-Limit Project); 2) Generalitat Valenciana (Prometeo, 2018/098), and 3) Universitat Jaume I (Nenuphar project UJI-B2018-71 and DEPE2D project UJI-B2019-09); 4) Fellowship Program (PREDOC/2017/40).Drets d'accés
info:eu-repo/semantics/openAccess
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