Photoluminescence properties of (Ce3+, Mn2+)-codoped CaCO3 red phosphor
Photoluminescence properties of (Ce3+, Mn2+)-codoped CaCO3 red phosphor
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DOI：
10.1063/1.4779856
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发表时间：
2013-01
影响因子：
3.2
通讯作者：
J. Nara;S. Adachi
中科院分区：
文献类型：
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作者：
J. Nara;S. Adachi
采用共沉淀法合成了（Ce3+, Mn2+）共掺杂CaCO3荧光粉，并通过漫反射、光致发光（PL）分析、PL激发光谱和PL寿命测量对其光学性能进行了研究。详细研究了Ce3+掺杂对Mn2+发射带的影响。在构型坐标模型的基础上，分析了随温度变化的PL特性。这些分析可以更好地理解CaCO3基质中Mn2+的PL特性。值得注意的是，（Ce3+, Mn2+）共掺杂荧光粉中Mn2+的红色发射强度比单独掺杂Mn2+的荧光粉增强了200多倍，这表明Ce3+和Mn2+离子之间发生了有效的共振能量转移。
(Ce3+, Mn2+)-codoped CaCO3 phosphors are synthesized by the coprecipitation method, and their optical properties are investigated using diffuse reflectance, photoluminescence (PL) analysis, PL excitation spectroscopy, and PL lifetime measurements. The effects of Ce3+ doping on the Mn2+ emission band are studied in detail. The temperature-dependent PL properties are analyzed on the basis of the configurational-coordinate model. These analyses allow a better understanding of the PL properties of Mn2+ within the CaCO3 host. Remarkably, the red emission intensity of Mn2+ in the (Ce3+, Mn2+)-codoped phosphor is enhanced more than 200 times compared to the single Mn2+-doped phosphor, thereby suggesting the occurrence of an efficient resonant energy transfer between Ce3+ and Mn2+ ions.