Luminescence properties of nanocrystalline Mg2P2O7:Eu phosphor

热释光 荧光粉 分析化学(期刊) 光致发光 粉末衍射 纳米晶材料 材料科学 结晶度 发光 扫描电子显微镜 活化能 离子 核化学 结晶学 化学 物理化学 纳米技术 光电子学 有机化学 色谱法 复合材料
作者
Karan Kumar Gupta,N.S. Dhoble,D. K. Burghate,S.J. Dhoble
出处
期刊:Luminescence [Wiley]
卷期号:33 (5): 947-953 被引量:24
标识
DOI:10.1002/bio.3494
摘要

Thermoluminescence (TL) measurements were carried out on europium (Eu) doped magnesium pyrophosphate (Mg2 P2 O7 ) nanopowders using gamma irradiation in the dose range of 0.1 to 3 kGy. The powder samples were successfully synthesized by chemical co-precipitation synthesis route. The formation and crystallinity of the compound was confirmed by powder X-ray diffraction (PXRD) pattern. The estimated particle size was found to be in nanometer scale by using Debye Scherer's formula. A scanning electron microscopy (SEM) study was carried out for the morphological characteristics of as synthesized Mg2 P2 O7 :Eu phosphor. Photoluminescence (PL) study was carried out to confirm the presence of the rare-earth ion and its valence state. The TL analysis of synthesized samples were performed after the irradiation of Mg2 P2 O7 :Eu with cobalt-60 (60 Co) gamma rays. The high and low intensity peaks of TL glow curve appeared at around 400 K, 450 K, 500 K and 596 K respectively. The appreciable shift in peak positions has been observed for different concentrations of Eu ion. The trapping parameters, namely activation energy (E), order of kinetics (b) and frequency factor (s) have been determined using thermal cleaning process, peak shape (Chen's) method and glow curve deconvolution (GCD) functions.
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