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Fabrication of K2O–Al2O3–Gd2O3–P2O5 glasses for photonic and scintillation materials applications
Radiation Physics and Chemistry ( IF 2.8 ) Pub Date : 2021-06-09 , DOI: 10.1016/j.radphyschem.2021.109639
N. Kiwsakunkran , W. Chaiphaksa , N. Chanthima , H.J. Kim , S. Kothan , A. Prasatkhetragarn , J. Kaewkhao

Dysprosium (Dy3+) doped glasses of the potassium aluminum gadolinium phosphate (KAGP) were fabricated by melt-quenching technique. The preparation of glasses was varied the concentrations of Dy2O3 at 0.00, 0.05, 0.10, 0.50, 1.00 and 3.00 mol%. The physical and spectroscopic properties were investigated for white light emitting devices. The absorption spectra were attributed to Dy3+ transitions from the 6H15/2, ground state to the various excited states and found that the intensity of absorption spectra was increased with increasing Dy2O3 concentration. The Judd-Ofelt (JO) intensity parameter Ωλ (λ = 2, 4 and 6) were estimated from the absorption spectra of 0.50 mol% Dy2O3 doped KAGP glass and found to be Ω2 > Ω4 > Ω6. The photoluminescence (PL) spectra were record under 350 nm and showed four intense peaks at 482, 573, 664 and 753 nm which correspond to the excited states (4F9/2) to 6H15/2, 6H13/2, 6H11/2 and 6H9/2 respectively. The intensity of emission spectra increased with content of Dy3+ ions until 0.5 mol% in KAGP glasses and beyond concentration quenching was observed. From the emission spectra have evaluated chromaticity co-ordinates CIE 1931 and observed that the emission of KAGP glasses was in the white region. The results approve that the Dy3+ doped KAGP glasses could be considered for optoelectronic devices such as lasers and white light emitting diode (w-LEDs). The radioluminescence (RL) spectra were measured and show the strongest emission from X-rays excitation at 0.5 mol% of Dy2O3. In evaluation of scintillation property between 0.50 mol% of Dy2O3 doped KAGP glass and BGO crystal, the integral scintillation efficiency was 9% of BGO. It can be potential for integration mode of scintillation such as in medical and industrial X-ray imaging applications.



中文翻译:

用于光子和闪烁材料应用的 K 2 O–Al 2 O 3 –Gd 2 O 3 –P 2 O 5玻璃的制造

镝 (Dy 3+ ) 掺杂的磷酸钾铝钆 (KAGP) 玻璃是通过熔融淬火技术制造的。玻璃的制备在0.00、0.05、0.10、0.50、1.00和3.00mol%的Dy 2 O 3浓度下变化。研究了白光发射器件的物理和光谱特性。吸收光谱归因于从6 H 15/2基态到各种激发态的Dy 3+跃迁,并发现吸收光谱的强度随着 Dy 2 O 3浓度的增加而增加。Judd-Ofelt (JO) 强度参数 Ω λ(λ = 2、4 和 6) 是从 0.50 mol% Dy 2 O 3掺杂的 KAGP 玻璃的吸收光谱估计的,发现是 Ω 2  > Ω 4  > Ω 6。光致发光 (PL) 光谱在 350 nm 下记录并在 482、573、664 和 753 nm 处显示四个强峰,分别对应于激发态 ( 4 F 9/2 ) 至6 H 15/26 H 13/26 H 11/26 H 9/2。发射光谱强度随着Dy 3+含量的增加而增加直到 KAGP 玻璃中的 0.5 mol% 和超过浓度淬灭被观察到。从发射光谱评估色度坐标 CIE 1931 并观察到 ​​KAGP 玻璃的发射是在白色区域。结果证实 Dy 3+掺杂的 KAGP 玻璃可以考虑用于光电器件,如激光器和白光发光二极管 (w-LED)。测量了辐射发光 (RL) 光谱,并显示了在 0.5 mol% Dy 2 O 3 时来自 X 射线激发的最强发射。0.50 mol% Dy 2 O 3之间的闪烁特性评价掺杂KAGP玻璃和BGO晶体,积分闪烁效率为BGO的9%。它可能是闪烁集成模式的潜力,例如在医疗和工业 X 射线成像应用中。

更新日期:2021-06-24
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