Enhanced photoluminescence quantum yield of Ce3+‐doped aluminum–silicate glasses for scintillation application

Ce3+‐doped 20Gd2O3–20Al2O3–60SiO2 (GAS:xCe3+) glasses (x = 0.3, 0.7, 1.1, 1.5, 1.9 mol%) with Si3N4 as a reducing agent were prepared. The density of the glasses is around 4.2 g/cm3. With the increase in the Ce3+ concentration, both the photoluminescence (PL) and PL excitation peaks of GAS:xCe3+ gla...

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Published inJournal of the American Ceramic Society Vol. 106; no. 1; pp. 476 - 487
Main Authors Wu, Tao, Hua, Zhehao, Tang, Gao, Ban, Huiyun, Cai, Hua, Han, Jifeng, Liu, Hui, Liu, Shan, Qian, Sen, Qin, Laishun, Ren, Jing, Sun, Xilei, Sun, Xin‐Yuan, Wen, Yufeng, Zhu, Yao
Format Journal Article
LanguageEnglish
Published Columbus Wiley Subscription Services, Inc 01.01.2023
Subjects
Aluminum
aluminum–silicate glass
BGO (crystal)
Ce3+‐doped
Cerium
Decay
Energy levels
Energy resolution
light yield
Photoluminescence
PL QY
Red shift
Reducing agents
scintillating decay time
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Summary:Ce3+‐doped 20Gd2O3–20Al2O3–60SiO2 (GAS:xCe3+) glasses (x = 0.3, 0.7, 1.1, 1.5, 1.9 mol%) with Si3N4 as a reducing agent were prepared. The density of the glasses is around 4.2 g/cm3. With the increase in the Ce3+ concentration, both the photoluminescence (PL) and PL excitation peaks of GAS:xCe3+ glasses show a redshift because the 4f–5d energy levels of Ce3+ ions are narrowed. PL quantum yield and PL decay time of GAS:xCe3+ glasses are 28.32–50.59% and 43–64 ns, respectively. In addition, they both first increases and then decreases with the Ce3+ concentration increasing, reached the maximum when x = 1.1 mol%. The integrated X‐ray excited luminescence (XEL) intensity of the GAS:1.1Ce3+ glass is 23.86% of that of Bi4Ge3O12 (BGO) crystal, and the light yield reaches 1200 ph/MeV with an energy resolution of 22.98% at 662 keV when exposed to γ‐rays. The PL and XEL thermal activation energies of GAS:xCe3+ glasses are independent of Ce3+ ions concentration. Scintillating decay time of the glasses exhibits two components consisting of nanosecond and microsecond levels, and the scintillating decay time gradually decreases with the Ce3+ concentration increasing. The difference between PL and scintillating decay time is discussed regarding the different luminescent mechanisms.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.18761