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In-air self-reduction synthesis and photoluminescent properties of Eu2+-Eu3+ activated CaAl2SixO2x+4 phosphors
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| 【文章作者】Li, Songchu;Yu, Lixin;Sun, Jiaju;Man, Xiaoqin |
| 【文章摘要】 In this paper, CaAl2SixO2x+4:Eu2+/Eu3+ (2%, molar ratio) phosphors with different SiO2 concentrations (x=0, 0.025, 0.05, 0.1, 0.25, 0.5, 1,1.5, and 2) were prepared by a high-temperature solid-state reaction under air condition with the absence of the reduction atmosphere. The crystalline phase, photo luminescent properties and luminescent lifetimes of the prepared samples were systematically studied. The results indicated that Eu2+ was reduced and obtained in air through self-reduction. The doping of SiO2 in calcium aluminates strongly affects the crystalline phase, excitation and emission spectra, CIE (Commission Internationale de I'Eclairage 1931 chromaticity) (x, y) position and lifetimes of europium. It is interesting and important that different luminescent colors can be obtained and modulated by changing the content of SiO2. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
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【卷】42 【ISSUE】7 【ISSUEID】815C0073
【文章期份】2016
【发布日期】2016/8/11 17:03:42
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