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纳米Sr2SiO4 ∶ Eu3+荧光粉的燃烧法合成及光谱性质
Synthesis of Nano-sized Sr2SiO4 ∶ Eu3+ Phosphor by Combustion Method and Its Luminescence Properties
- 发光学报 2011年32卷第6期 页码：535-541
- 作者机构：
1. 暨南大学物理学系 思源实验室,广东 广州,510632
2. 暨南大学化学系 纳米化学研究所,广东 广州,510632
3. 暨南大学 电子工程系,广东 广州,510632
- 作者简介：
- 基金信息：暨南大学引进优秀人才科研启动基金();中央高校基本科研业务费专项资金();国家自然科学基金 (50903038,50872045)资助项目()
DOI：10.3788/fgxb20113206.0535
中图分类号： O482.31收稿日期：2011-01-26，
修回日期：2011-02-28，
网络出版日期：2011-06-22，
纸质出版日期：2011-06-22
- 稿件说明：
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雷炳富, 沙磊, 刘应亮, 满石清, 乐松. 纳米Sr<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup>荧光粉的燃烧法合成及光谱性质[J]. 发光学报, 2011,32(6): 535-541
LEI Bing-fu, SHA Lei, LIU Ying-liang, MAN Shi-qing, YUE Song. Synthesis of Nano-sized Sr<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup> Phosphor by Combustion Method and Its Luminescence Properties[J]. Chinese Journal of Luminescence, 2011,32(6): 535-541
雷炳富, 沙磊, 刘应亮, 满石清, 乐松. 纳米Sr<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup>荧光粉的燃烧法合成及光谱性质[J]. 发光学报, 2011,32(6): 535-541 DOI： 10.3788/fgxb20113206.0535.
LEI Bing-fu, SHA Lei, LIU Ying-liang, MAN Shi-qing, YUE Song. Synthesis of Nano-sized Sr<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup> Phosphor by Combustion Method and Its Luminescence Properties[J]. Chinese Journal of Luminescence, 2011,32(6): 535-541 DOI： 10.3788/fgxb20113206.0535.
摘要
利用快速燃烧合成方法制备了Sr
2
SiO
4
∶ Eu
3+
纳米材料。用X射线粉末衍射、 扫描电镜、稳态激发与发射光谱、高分辨发射光谱、位置选择激发光谱和发光衰减等测量对材料的结构、形貌和光致发光性质进行了研究。分析结果表明
通过二甲酰肼的快速燃烧
在800 ℃条件下反应3 min即可制得颗粒尺寸在80~100 nm左右的-Sr
2
SiO
4
∶ Eu
3+
纳米材料
在紫外线激发下
所合成的样品具有良好的发光性能。由于纳米材料中表面格位的存在
Eu
3+
的局域环境变得十分复杂
其发光寿命与体材料相比有明显的下降
并且发光衰减呈现由单指数衰减向双指数衰减转变的趋势。
Abstract
Nano-sized Sr
2
SiO
4
∶ Eu
3+
phosphors were successfully synthesized by a rapid synthetic route using the combustion method. Through the chemical reaction of Sr(NO
3
)
2
Eu(NO
3
)
3
and fumed silica
pure-phase of nano-size -Sr
2
SiO
4
∶ Eu
3+
can be obtained by sintering under 800 ℃ for 3 min. The crystallization and morphology of the as-synthesized Sr
2
SiO
4
∶ Eu
3+
phosphors were investigated using XRD and scanning electron microscopy. The Sr
2
SiO
4
∶ Eu
3+
particle size is in a range of 80~100 nm. Furthermore
luminescence properties of the nano-size Sr
2
SiO
4
∶ Eu
3+
phosphors
including photoluminescence
high-resolution emission spectra
site-selective excitation and emission spectra and excited-state decay curves are also systemically discussed in this paper and compared with that of Sr
2
SiO
4
∶ Eu
3+
prepared by the conventional high-temperature solid-state reaction method. Under UV light excitation
this phosphor shows intense red light. Due to the presence of the surface states that the Eu
3+
are located
the local environment of the Eu
3+
sites in nano-sized Sr
2
SiO
4
∶ Eu
3+
phosphor are more complicated compared with that of the bulk material
which leads to the decreased excited lifetime values. Furthermore
the luminescence decay curves of Eu
3+
changing from single-exponential to double-exponential due the presence of the surface states.
关键词
Keywords
references
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