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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.)

Multicolor tunable and NIR broadband emission from rare-earth-codoped tantalum germanate glasses and nanostructured glass-ceramics

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Marcondes, Lia Mara [1] ; da Cunha, Cristiano Ramos [1] ; de Pietro, Gabriele Matinatti [1] ; Manzani, Danilo [2] ; Goncalves, Rogeria Rocha [3] ; Batista, Gislene [1] ; Cassanjes, Fabia Castro [1] ; Poirier, Gael [1]
Total Authors: 8
[1] Univ Fed Alfenas, Grp Quim Mat, Campus Pocos de Caldas, Pocos De Caldas, MG - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Chem, Sao Carlos, SP - Brazil
[3] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, Ribeirao Preto, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Luminescence; v. 239, NOV 2021.
Web of Science Citations: 0

High photoluminescence efficiency, unusual NIR broadband and tunable emission are possible in erbium-doped and tantalum germanate glasses and nanostructured glass-ceramics. The chemical microenvironment around erbium ions and their influence on optical properties are dependent on the TaO6 clusters formation and tantalum perovskite-like bronze crystallization, which are strongly related to the tantalum oxide content and annealing. Erbium ions are preferably distributed close to tantalum-rich environment, providing an intense emission with minimized nonradiative processes and inhomogeneous broadband NIR emission with increasing site numbers. A more pronounced broadening in the nanocrystalline samples is due to the multi-sites of the tantalum perovskitelike bronze crystalline structure. Green/red tunable emission from up conversion processes was observed since the erbium ions occupy a chemical environment with low phonon energy in the tantalum germanate glass and with close neighbors in the tantalum germanate glass-ceramics. Accordingly, the highly tantalum germanate glasses and glass ceramics are promising for photonic applications in optical amplification, lighting and lasing, as well as for nonlinear optical applications and studies considering the perovskite-like bronze crystalline samples. (AU)

FAPESP's process: 20/01786-1 - Nonlinear optic and magneto-optic in glass and glass-ceramics containing niobium and tantalum
Grantee:Lia Mara Silva Marcondes
Support Opportunities: Scholarships in Brazil - Post-Doctoral
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: 18/16126-7 - Optically active glasses for photonic applications: synthesis, characterization and applications of quantum dots embedded in oxide glasses.
Grantee:Danilo Manzani
Support Opportunities: Regular Research Grants
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
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