Niobium oxide influence in the phosphate glasses triply doped with Er3+/ Yb3+/Eu3+ prepared by the melting process

Author(s)

Faleiro, Jose Henrique ^[1] ; Dantas, Noelio O. ^[2] ; Silva, Anielle C. A. ^[2] ; Barbosa, Helliomar P. ^[1] ; da Silva, Bruno H. S. T. ^[3] ; Lima, Karmel de O. ^[4] ; Goncalves, Rogeria Rocha ^[4] ; Ferrari, Jefferson Luis ^[1]

Affiliation

^[1] Univ Fed Uberlandia, Lab Mat Fotoluminescentes LAMAF, Desenvolvimento Mat Inorgan Terras Raras DeMITeR, Inst Quim, Ave Joao Naves Avila, 2121, BR-38400902 Uberlandia, MG - Brazil

^[2] Univ Fed Alagoas, Inst Fis, Lab Novos Mat Nanoestruturais & Funcionais LNMIS, Ave Lourival Melo Mota, S-N, BR-57072900 Maceio, Alagoas - Brazil

^[3] Univ Fed Uberlandia, Inst Quim, Lab Mat Fotoluminescentes LAMAF, Nucleo Pesquisa Sintese Organ & Catalise NuPSOC, Ave Joao Naves Avila, 2121, BR-38400902 Uberlandia, MG - Brazil

^[4] Univ Sao Paulo, Dept Quim, FFCLRP, Lab Mat Luminescentes Micro & Nanoestrutura, Ave Bandeirantes, 3900, BR-14040901 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Journal of Non-Crystalline Solids; v. 571, NOV 1 2021.
• Web of Science Citations: 0

Abstract

This work reports on the preparation and photoluminescence properties of the phosphate glass matrix based on P2O5-Al2O5-Na2O-K2O (PANK) doped with Yb3+, Eu3+ and Er3+ with different amount of Nb2O5 prepared by the conventional melting process. The Raman bands assigned to the Nb2O5 indicating the insertion of this oxide in the glass. Under UV excitation, the emission spectra presented narrow bands assigned to the Eu3+, arising from the 5D0 -> 7FJ (J = 0, 1, 2, 3 and 4). It was observed that the materials have at least two lifetimes values of the Eu3+ ion. In all materials, it was observed that the amount of Nb2O5 does not influence the photo-luminescent properties of the Eu3+ ion, providing potential applications in energy conversion. The optical properties like refractive index, optical basicity, optical electronegativity, Urbach Energy, direct and indirect band-gap, JuddOfelt parameters were calculated and the covalence bonding of Eu3+ with the neighbors ligands was evaluated as a function of Nb2O5 concentration. Co-doping with Er3+/Yb3+ promotes the emission in the infrared region, with a maximum around 1535 nm and bandwidth of 28 nm under 980 nm pumping. (AU)

• FAPESP's process: 18/18213-4 - Synthesis of luminescent multifunctional nanomaterials based on fluorides and oxides doped with rare earths for Teranostic applications
• Grantee: Karmel de Oliveira Lima
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• 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