ZnGa2O4:Cr3+: a new red long-lasting phosphor with high brightness
ZnGa2O4:Cr3+: a new red long-lasting phosphor with high brightness
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DOI：
10.1364/oe.19.010131
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发表时间：
2011-05-23
期刊：
影响因子：
3.8
通讯作者：
Gourier, Didier
中科院分区：
文献类型：
--
作者：
Bessiere, Aurelie;Jacquart, Sylvaine;Gourier, Didier
ZnGa 2 O 4：Cr 3+是一种新型的亮红色紫外激发的长余辉荧光粉，由于其650 nm-750 nm的发射范围，可能适用于体内成像。光致发光和X射线激发的辐射发光显示，理想Cr ~（3+）和Cr ~（3+）的E ~（2 -）>（4）A ~（2）发射线都被相邻的反位缺陷所扭曲，而长余辉（LLP）和热释光（TSL）几乎都是通过扭曲的Cr ~（3+）产生的。最强烈的LLP获得与名义Zn缺乏，并在335 K的TSL峰有关。提出了LLP和TSL的机制，即导致Cr 3+扭曲的反位缺陷充当深陷阱。2011美国光学学会Optical Society of America
ZnGa2O4:Cr3+ is shown to be a new bright red UV excited long-lasting phosphor potentially suitable for in vivo imaging due to its 650 nm-750 nm emission range. Photoluminescence and X-ray excited radioluminescence show the E-2 -> (4)A(2) emission lines of both ideal Cr3+ and Cr3+ distorted by a neighboring antisite defect while long-lasting phosphorescence (LLP) and thermally stimulated luminescence (TSL) almost exclusively occur via distorted Cr3+. The most intense LLP is obtained with a nominal Zn deficiency and is related to a TSL peak at 335K. A mechanism for LLP and TSL is proposed, whereby the antisite defect responsible for the distortion at Cr3+ acts as a deep trap. (C)2011 Optical Society of America