EPR and luminescence studies of Cr3+ doped MgSrAl10O17 phosphor synthesized by a low-temperature solution combustion route
EPR and luminescence studies of Cr3+ doped MgSrAl10O17 phosphor synthesized by a low-temperature solution combustion route
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DOI：
10.1016/j.jlumin.2014.03.035
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发表时间：
2014-10
影响因子：
3.6
通讯作者：
Vijay P. Singh;R. Chakradhar;J. Rao;S. H. Kim
中科院分区：
文献类型：
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作者：
Vijay P. Singh;R. Chakradhar;J. Rao;S. H. Kim
采用溶液燃烧法在500 °C的高温下短时间（< 5 min）合成了MgSrAl 10 O 17：Cr 3+荧光粉。采用X射线衍射、傅里叶变换红外光谱和扫描电镜等技术对所制备的荧光粉进行了表征。MgSrAl 10 O 17荧光粉中Cr 3+离子的EPR谱表明与Cr 3+离子相关的多种对称性。光学研究表明，两个广泛的和强烈的带特征的Cr 3+离子的八面体对称。在552 nm激发下，观察到一条中心位于690 nm的强窄红光发射线，这与Cr ~（3+）离子的2 Eg → 4A 2g跃迁有关。计算并讨论了晶体场参数（Dq）和Racah参数（BandC）。
MgSrAl10O17:Cr3+powder phosphor has been synthesized by a solution combustion method at furnace temperature of 500 °C in a short time (< 5 min). The as-prepared phosphor was characterized by X-ray diffraction, Fourier transform infrared and scanning electron microscopic techniques. EPR spectrum of Cr3+ions in MgSrAl10O17phosphor suggested a variety of symmetries associated with Cr3+ions. The optical studies show two broad and intense bands characteristic of Cr3+ions in an octahedral symmetry. Upon 552 nm excitation, an intense narrow red emission line centered at 690 nm has been observed related to2Eg→4A2gtransition of Cr3+ions. The crystal field parameter (Dq) and Racah parameters (BandC) have been evaluated and discussed.