Eu2+ activated long persistent strontium aluminate nano scaled phosphor prepared by precipitation method

被引：88

作者：

Chang, CK ^{[1
]}

Yuan, ZX ^{[1
]}

Mao, DL ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 415卷 / 1-2期

基金：

上海市自然科学基金;

关键词：

strontium aluminate; afterglow; phosphor; luminescence;

D O I：

10.1016/j.jallcom.2005.04.219

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper reports the detailed preparation process of Eu2+ activated long lasting Sr(4)Al(14)o(25) nano sized phosphor by precipitation method. Scanning electron microscopy (SEM), simultaneous DSC-TG, X-ray diffraction (XRD), photo luminescent spectroscope (PLS) and thermal luminescent (TL) spectroscope were employed to characterize the phosphor. SrAl2O4:Eu2+Dy3+ and Sr4Al14O25:Eu2+Dy3+ phosphors in nano scale were obtained by calcinating the precipitated precursor at 1200 and 1300 degrees C, respectively. Both the low-temperature product SrAl2O4:Eu2+Dy3+ and the high-temperature product Sr4Al14O25:Eu2+Dy3+ showed photoluminescence upon UV illumination with an emission peak at 480 and 505 rim, respectively. When compared to the powder obtained in conventional method, the nano sized powders revealed a blue shift in emission spectrum due to the decrease in grain size. Those two phosphors showed long persistent afterglow, and the Sr4Al14O25:Eu2+Dy3+ phosphor exhibited better afterglow property than SrAl2O4:Eu2+Dy3+ phosphor due to a deeper trap level and a higher trap concentration formed in the host material. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：220 / 224

页数：5

共 14 条

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