Luminescence in Sr4Al14O25:Ce3+ aluminate phosphor

被引:6
作者
Nikhare, G. N. [1 ]
Gedam, S. C. [2 ]
Dhoble, S. J. [1 ]
机构
[1] RTM Nagpur Univ, Dept Phys, Nagpur 440033, Maharashtra, India
[2] KZS Sci Coll, Nagpur 441501, Maharashtra, India
关键词
aluminates; phosphors; combustion synthesis; photoluminescence; thermoluminescence; THERMOLUMINESCENCE DOSIMETRY PHOSPHOR; CRYSTALLINE ENVIRONMENT; 5D-LEVEL ENERGIES; CORRELATED ESR; CE3+; SCINTILLATION; EMISSION; PR3+; PL; TL;
D O I
10.1002/bio.2708
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Cerium-doped Sr4Al14O25 phosphor is prepared using a single-step combustion synthesis and its X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and thermoluminescence (TL) properties are characterized. XRD reveals the formation of the desired phase in the prepared sample. SEM micrographs of the prepared Sr4Al14O25 phosphor show that the particle size is 10 mu m. The prepared Sr4Al14O25, along with Sr4Al14O25:Ce-x (x = 0.5-5 mol%) shows a PL emission peak at 314 nm under UV excitation of 262 nm wavelength due to 5d 4f transition. The phosphor is suitable for higher concentrations of Ce ions. The TL glow peak reveals three clearly visible distinct peaks at temperatures around 130, 231 and 336oC. The three peaks are separated by deconvolution and kinetic parameters calculated using Chen's peak shape method. The calculation shows that the reaction follows second-order kinetics with activation energy (E) values of 0.52, 0.81 and 1.12 eV, and frequency factor (s) values of 5.58 x 10(5), 4.53 x 10(7) and 4.57 x 10(8) s(-1) for the three individual peaks. Copyright (c) 2014 John Wiley & Sons, Ltd.
引用
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页码:163 / 167
页数:5
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