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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Highly red luminescent Nb2O5:Eu3+ nanoparticles in silicate host for solid-state lighting and energy conversion

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Caixeta, Fabio Jose [1] ; Aquino, Felipe Thomaz [2] ; Pereira, Rafael Ramiro [1] ; Goncalves, Rogeria Rocha [1]
Total Authors: 4
[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Lab Mat Luminescentes Micro & Nanoestruturados Ma, Ave Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil
[2] Univ Fed Mato Grosso, Fac Engn Varzea Grande, Varzea Grande - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Optical Materials; v. 111, JAN 2021.
Web of Science Citations: 1

A high intrinsic quantum yield and color purity red-emitting nanostructured Eu3+-doped 1-xSiO(2-x)Nb(2)O(5) materials were prepared by a new sol-gel route at different Si:Nb molar ratio for solid-state lighting and energy conversion. It was evaluated how the composition and annealing temperature can affect the structure of the materials and their luminescence features. Eu3+ ions distribution into the different symmetry sites of nanoscaled orthorhombic or monoclinic Nb2O5 particles considerately influenced their emission profile and efficiency. A UV and blue to red downshifting were detected, and by using Judd-Ofelt theory, high quantum intrinsic quantum yield up to 65% is calculated for the Eu3+ doped Nb2O5 nanoparticles upon excitation at 463 nm. Additionally, the chromaticity diagram figured out a red color purity up to 90.1% is obtained, making them promising material for solid-state lighting. The particle size and doping control make them possible to explore the solid-state property of nanoscaled Nb2O5 particles as a host, with the advantage of their homogenous dispersion in a silicate network, opening the possibility of their use as planar waveguides for solar cell concentrators and energy conversion for enhancement of solar cell efficiency. (AU)

FAPESP's process: 20/05319-9 - Multifunctional plataforms based on lanthanide doped nanostructured luminescent materials for potential photonic and theranostic applications
Grantee:Rogéria Rocha Gonçalves
Support Opportunities: Regular Research Grants
FAPESP's process: 17/11301-2 - Rare earth doped micro and nanostructures luminescent materials: properties and applications
Grantee:Rogéria Rocha Gonçalves
Support Opportunities: Regular Research Grants
FAPESP's process: 17/10423-7 - Broad band NIR emission from nanostructured Rare earth doped Nb2O5 and Ta2O5 derived materials for photonic applications as optical amplifiers and energy converters.
Grantee:Fábio José Caixeta
Support Opportunities: Scholarships in Brazil - Doctorate