X-ray Excited Luminescence from Cr Doped YAG Crystals

被引：3
|
作者：
Katsumata, Toru [1 ,2 ]
Ogawa, Misa [1 ]
Takahagi, Kotomi [1 ]
Isobe, Ayame [1 ]
Aizawa, Hiroaki [1 ]
机构：
[1] Toyo Univ, Fac Sci & Engn, 2100 Kujirai, Kawagoe, Saitama 3508585, Japan
[2] Toyo Univ, Res Inst Ind Technol, 2100 Kujirai, Kawagoe, Saitama 3508585, Japan
来源：
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY | 2021年 / 10卷 / 05期
关键词：
OPTICAL LUMINESCENCE; STATE;
D O I：
10.1149/2162-8777/ac029e
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
X-ray excited visible light luminescence were evaluated from Cr doped Y3Al5O12 (YAG) crystals using an X-ray powder diffractometer adapting a fiber spectrometer, a digital camera, and a LED illumination. Red colored luminescence peaking at lambda = 678, 690, 708, and 726 nm were observed from Cr doped YAG under irradiation by both CuK alpha X-ray and a violet LED (lambda = 405 nm). Peak wavelengths of X-ray excited luminescence are the same as those of photoluminescence (PL). The peak intensities of X-ray excited luminescence, which increases linearly with X-ray strength, increases up to Cr concentration at around 0.5 mol%, then decreases gradually with Cr concentration due to a concentration quenching. It was found that the concentration quenching of X-ray excited luminescence occurs at a lower concentration at around 0.5 mol% than that of PL at around 3.5 mol%.
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页数：6
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