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Photoluminescence and thermoluminescence performance in Tb 3+ -activated aluminum borosilicate glass with high thermal stability for blue-green laser and TLD applications
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| 【文章作者】Li, Yongtao;Dong, Zongyan;Xu, Shuo;Wu, Chuhan;Chen, Jie;Zhang, Chenyang;Qi, Haina;Zhang, Xuejian;Liu, Huisheng;Chi, Yaodan;Sun, Xinran;Mahadevan, C. K. |
| 【文章摘要】 A series of Tb3+ ions doped sodium magnesium aluminum borosilicate glasses 15Na(2)O-15MgO-15Al(2)O(3)-20SiO(2)-35B(2)O(3) (abbreviated as NMASB):xTb(3+) (x = 0, 0.2, 0.6, 0.8, 1, 1.5 and 2 %) were prepared by the high-temperature melting method. The structural properties of the glass were explored by analyzing the results of X-ray diffractometer (XRD), infrared and Raman spectra. The Delta T value of Differential scanning calorimeter (DSC) showed good thermal stability of the glass. The optical properties of the glass were studied by absorption spectroscopy, photoluminescence (PL) spectroscopy, CIE chromaticity color temperature, fluorescence decay curve, quantum efficiency and thermoluminescence (TL) curve. The absorption spectrum owned four absorption peaks at 351, 368, 377 and 485 nm, and the optical band gap of the glass with different Tb3+ concentrations was from 3.37 to 3.27 eV. Under the excitation at 377 nm, the NMASB:Tb-\ glass showed several sharp emission peaks centered at 485, 543, 582 and 622 nm, corresponding to the transitions of D-5(4) -> F-7(n) (n = 6, 5, 4, 3), respectively. The fluorescence lifetime was fitted by the three-exponential function ranged from 2.89 ms for NMASB:0.2%Tb3+ to 2.66 ms for NMASB:2%Tb3+, indicating that the glass had high charge separation efficiency. Judd-Ofelt theory was used to fit the intensity parameters Omega(i) (i = 2,4,6), and the absorption oscillator strengths, spectral quality factors, spontaneous transition probabilities, and fluorescence branching ratios of the optical transitions were calculated. The TL curves of pure and Tb-doped glasses both owned two peaks, indicating that there were two different depths of traps in the glass. The luminescence intensity was greatly improved after Tb doping, and the TL intensity of the glass was linearly related to the dose. These results indicate that Tb-doped NMASB glass can be a potential material for blue-green laser and thermoluminescence dosimeter(TLD) applications. |
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【卷】【ISSUE】【ISSUEID】
【文章期份】2024
【发布日期】2025/5/13 10:04:15
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