Physical and photoluminescence investigations of Eu3+ doped gadolinium borate scintillating glass
Physical and photoluminescence investigations of Eu3+ doped gadolinium borate scintillating glass
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DOI：
10.1016/j.radphyschem.2022.110386
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发表时间：
2022-10-04
影响因子：
2.9
通讯作者：
Kaewkhao, R. J.
中科院分区：
文献类型：
--
作者：
Damdee, B.;Kirdsiri, K.;Kaewkhao, R. J.
采用熔体淬冷技术，在1400 ℃下保温3 h，制备了25 Gd 2 O3-（75-x）B2 O3-xEu 2 O3（GdBEu）（x = 0.1，0.3，0.5，1.0，3.0，5.0，7.0和9.0mol%）掺Eu的明亮的红橙色硼酸盐玻璃。研究了所有GdBEu玻璃的光致发光、闪烁和激光激发电位特性。发现了玻璃中Gd ~（3+）-Eu ~（3+）的能量传递过程。紫外线、可见光和近红外区域波长的光子被玻璃吸收。分别在275 nm和394 nm处进行光致发光激发。当能量从Gd ~（3+）转移到Eu ~（3+）时，发光特征显示出波长为614 nm（5D ~ 0-* 7 F ~ 2）的强红光发射。玻璃的最佳Eu 3+离子浓度为7.0摩尔%，对应于最大发射强度。Judd-Ofelt参数从发射光谱计算和几个激发态的辐射性质进行了检查，包括跃迁概率（AR），分支比（SR），受激发射截面（ce），和衰减时间（rR）。一旦Eu 3+浓度从0.1摩尔%增加到9.0摩尔%，5D 0能级的衰减时间从1.824 ms下降到1.585 ms。通过国际锐调照明委员会（CIE）色度图证实了玻璃的颜色。玻璃样品的辐射发光（RL）谱峰面积为BGO晶体的18%。
The bright reddish-orange emitting Eu3+-doped gadolinium borate glasses of 25Gd2O3-(75-x) B2O3-xEu2O3 (GdBEu) (x = 0.1, 0.3, 0.5, 1.0, 3.0, 5.0, 7.0, and 9.0 mol%) were fabricated by melt-quenching technique at 1400 degrees C for 3 h. All GdBEu glasses were investigated the photoluminescence, scintillation, and lasing potential properties. The energy transfer processes from Gd3+-*Eu3+ in these glasses were discovered. Photons in the ultraviolet, visible, and near-infrared region wavelengths were absorbed by glasses. The photoluminescence excitations were performed at 275 nm and 394 nm, respectively. When the energy transferred from Gd3+ to Eu3+, luminescence features revealed an intense red emission with a wavelength of 614 nm (5D0 -* 7F2). The glass's optimum Eu3+ ion concentration was 7.0 mol%, corresponding to the maximum emission intensity. Judd-Ofelt parameters were calculated from the emission spectra and the radiative properties of several excited states were examined, including the transition probability (AR), branching ratio (SR), stimulated emission cross-section (ce), and decay time (rR). Once the Eu3+ concentration increased from 0.1 to 9.0 mol%, the decay time of the 5D0 level dropped from 1.824 ms to 1.585 ms. The colors of glasses were confirmed by the Commission internationale de l'e acute accent clairage (CIE) chromaticity diagram. The glass samples had a peak area of radioluminescence (RL) spectrum 18% of BGO scintilltation crystal.