Radiation-induced reduction of Eu3+ doped in

被引：14
作者：
Kohara, Yuto [1 ,2 ]
Okada, Go [1 ,2 ]
Tsuyumoto, Isao [1 ]
Kusano, Eiji [1 ,2 ]
Nanto, Hidehito [2 ]
机构：
[1] Kanazawa Inst Technol, Dept Appl Chem, 7-1 Ohgigaoka, Nonoichi, Ishikawa 9218501, Japan
[2] Kanazawa Inst Technol, Cocreat Res Ctr Ind Sci & Technol CIST, 3-1 Yatsukaho, Haku San, Ishikawa 9240838, Japan
来源：
MATERIALS LETTERS | 2021年 / 303卷
关键词：
RPL; SrAl2O4; Europium; Ionizing radiation; RADIO-PHOTOLUMINESCENCE; CERAMICS; EUROPIUM; PHOSPHOR;
D O I：
10.1016/j.matlet.2021.130502
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this letter, we report radio-photoluminescence (RPL) properties of Eu-doped SrAl2O4. The RPL is a phenomenon in which a new luminescence center is generated by ionizing radiation. The material was synthesized via the solid-state reaction. The synthesized sample shows photoluminescence (PL) due to the 4f-4f transition of Eu3+ and the 4f65d1 -> 4f7 transition of Eu2+. After X-ray irradiation, the former emission intensity decreases while the latter one increases, and the extent of the change depends on the radiation dose. The change in the RPL is attributed to a reduction of Eu3+ by trapping an X-ray generated electron (Eu3+-> Eu2+). In addition, a heattreatment effectively reverses the above reaction by detrapping an electron from the Eu2+ center.
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页数：4
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