Effects of Eu2+ doping on the structure and luminescence properties of strontium borosilicate glasses
| Autor: | Yunhao Liang, Chuanlong Liu, Yang Fu, Libin Xia, Chengyue Li, Qinghui Xiao, Yijun Zhuang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Band gap Borosilicate glass Doping Analytical chemistry Phosphor 02 engineering and technology Activation energy 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Molecular electronic transition Electronic Optical and Magnetic Materials 0103 physical sciences Materials Chemistry Ceramics and Composites 0210 nano-technology Luminescence Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Non-Crystalline Solids. 552:120453 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2020.120453 |
| Popis: | Eu2+-doped SiO2-SrO-B2O3 glasses (abbreviated as GE) were successfully prepared and the structure and luminescence properties were detailed investigated. The results show that the GE glass with 0.4 mol% Eu2+ has the most compact structure owing to its low molar volume, high density. The GE glasses exhibit broad luminescence band centered at approximately 469 nm and 0.4 mol% Eu2+ is the optimum doping concentration. The absorption and emission spectra show redshift as increasing Eu2+ concentration. The optical band gap decreases from 2.86 to 2.68 eV and the Urbach energy decreases from 0.2241 to 0.1737 eV. The 5d-4f transition of Eu2+ is an indirect electronic transition. Concentration quenching occurs with the increase of Eu2+ content and the mechanism is belong to the type of electric dipole-dipole interaction. The luminescence intensity decreases with increasing temperature and the thermal quenching activation energy is 0.26 eV. The chromaticity shift is lower than Eu2+-doped commercial phosphors. |
| Databáze: | OpenAIRE |
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