Network Structure and Luminescent Properties of ZnO–B<sub>2</sub>O<sub>3</sub>–Bi<sub>2</sub>O<sub>3</sub>–WO<sub>3</sub>:Eu<sup>3+</sup> Glasses
oleh: Aneliya Yordanova, Margarita Milanova, Reni Iordanova, Margit Fabian, Lyubomir Aleksandrov, Petia Petrova
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2023-10-01 |
Deskripsi
In this study, we investigated the influence of Bi<sub>2</sub>O<sub>3</sub> and WO<sub>3</sub> on both structure and optical properties of 50ZnO:(49 − x)B<sub>2</sub>O<sub>3</sub>:1Bi<sub>2</sub>O<sub>3</sub>:xWO<sub>3</sub>; x = 1, 5, 10 glasses doped with 0.5 mol% Eu<sub>2</sub>O<sub>3</sub>. IR spectroscopy revealed the presence of trigonal BØ<sub>3</sub> units connecting superstructural groups, [BØ<sub>2</sub>O]<sup>−</sup> metaborate groups, tetrahedral BØ<sub>4</sub><sup>−</sup> units in superstructural groupings (Ø = bridging oxygen atom), borate triangles with nonbridging oxygen atoms, [WO<sub>4</sub>]<sup>2−</sup> tetrahedral, and octahedral WO<sub>6</sub> species. Neutron diffraction experimental data were simulated by reverse Monte Carlo modeling. The atomic distances and coordination numbers were established, confirming the short-range order found by IR spectra. The synthesized glasses were characterized by red emission at 612 nm. All findings suggest that Eu<sup>3+</sup> doped zinc borate glasses containing both WO<sub>3</sub> and Bi<sub>2</sub>O<sub>3</sub> have the potential to serve as a substitute for red phosphor with high color purity.