Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Structure and Luminescent Properties of Niobium Modified ZnO-B2O3:Eu3+ Glass

Reni Iordanova
ORCID logo ,
Margarita Milanova
* ORCID logo ,
Aneliya Yordanova
ORCID logo ,
Lyubomir Aleksandrov
,
Nikolay Nedylkov
,
Rosica Kukeva
,
Petia Petrova
ORCID logo
Version 1 : Received: 16 February 2024 / Approved: 18 February 2024 / Online: 19 February 2024 (11:48:45 CET)

A peer-reviewed article of this Preprint also exists.

Iordanova, R.; Milanova, M.; Yordanova, A.; Aleksandrov, L.; Nedyalkov, N.; Kukeva, R.; Petrova, P. Structure and Luminescent Properties of Niobium-Modified ZnO-B2O3:Eu3+ Glass. Materials 2024, 17, 1415. Iordanova, R.; Milanova, M.; Yordanova, A.; Aleksandrov, L.; Nedyalkov, N.; Kukeva, R.; Petrova, P. Structure and Luminescent Properties of Niobium-Modified ZnO-B2O3:Eu3+ Glass. Materials 2024, 17, 1415.

Abstract

In this study we have investigated the effect of the addition of Nb2O5 (up to 5 mol%) on the structure and luminescent properties of ZnO-B2O3 glass doped with 0.5 mol % Eu2O3 by using of infrared (IR), Raman and photoluminescence (PL) spectroscopy. Physical properties as molar volume, oxygen packing density and glass transition temperature were determined using the results of differential thermal analyisis (DTA) and Archimedes principle for density. IR and Raman spectra revealed that niobium ions incorporate into the base zinc borate glass as NbO4 trtraherda and NbO6 octahedra. A strong red emission from the 5D0 level of Eu3+ ions was registered under near UV (392 nm) excitation using the sharp 7F0 - 5L6 transition of Eu3+. The integrated fluorescence intensity ratio R (5D0 → 7F2/5D0 → 7F1) was calculated to estimate the degree of asymmetry around the active ion, suggesting a location of Eu3+ in non-centrosymmetric sites. The higher Еu3+ luminescence emission observed in zinc borate glasses containing 1÷5 mol% Nb2O5 compared to the Nb2O5-free zinc borate glass evidences that Nb2O5 is suitable component for modification of host glass structure and improving the emission intensity.

Keywords

glass structure; europium; IR; photoluminescence; density

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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