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γ-Ca2SiO4: Ce3+,Al3+荧光粉的合成与发光性能研究
Synthesis and Luminescent Properties of γ-Ca2SiO4: Ce3+,Al3+ Phosphors
- 发光学报 2016年37卷第11期 页码：1332-1338
- 作者机构：
1. 江西理工大学 冶金与化学工程学院,江西 赣州,341000
2. 国家离子型稀土资源高效开发利用工程技术研究中心,江西 赣州,341000
- 作者简介：
- 基金信息：国家自然科学基金（51304086）();江西省高等学校科技落地计划项目（KJLD14045）();江西省自然科学基金（2013BAB206020）();江西省教育厅科
DOI：10.3788/fgxb20163711.1332
中图分类号： O482.31纸质出版日期：2016-11-5，
收稿日期：2016-5-12，
修回日期：2016-6-13，
扫 描 看 全 文
江建青, 杨凤丽, 侯得健等. γ-Ca<sub>2</sub>SiO<sub>4</sub>: Ce<sup>3+</sup>,Al<sup>3+</sup>荧光粉的合成与发光性能研究[J]. 发光学报, 2016,37(11): 1332-1338
JIANG Jian-qing, YANG Feng-li, HOU De-jian etc. Synthesis and Luminescent Properties of γ-Ca<sub>2</sub>SiO<sub>4</sub>: Ce<sup>3+</sup>,Al<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2016,37(11): 1332-1338
江建青, 杨凤丽, 侯得健等. γ-Ca<sub>2</sub>SiO<sub>4</sub>: Ce<sup>3+</sup>,Al<sup>3+</sup>荧光粉的合成与发光性能研究[J]. 发光学报, 2016,37(11): 1332-1338 DOI： 10.3788/fgxb20163711.1332.
JIANG Jian-qing, YANG Feng-li, HOU De-jian etc. Synthesis and Luminescent Properties of γ-Ca<sub>2</sub>SiO<sub>4</sub>: Ce<sup>3+</sup>,Al<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2016,37(11): 1332-1338 DOI： 10.3788/fgxb20163711.1332.
摘要
采用高温固相法制备了一系列-Ca
2
SiO
4
∶
x
Ce
3+
，
y
Al
3+
黄色荧光粉，通过X射线衍射仪、扫描电镜、激光粒度仪、荧光光谱仪对荧光粉的结构、形貌和光学性能进行了表征。结果表明，1200~1300℃温度下生成-Ca
2
SiO
4
，在1350~1500℃下生成-Ca
2
SiO
4
，Al
3+
和Ce
3+
的掺入未改变Ca
2
SiO
4
的结构。在1450℃下合成的-Ca
2
SiO
4
∶0.5%Ce
3+
，4%Al
3+
样品的相对发光强度最强。在450nm激发下，在565nm处存在一个宽带发射峰，主要源于Ce
3+
的5d
2
F
7/2
和5d
2
F
5/2
跃迁。荧光粉受热影响较大，在450nm激发下，样品在475K时的发光强度降为室温的63%。监控波长为565nm时，Ce
3+
的衰减曲线符合单指数衰减规律，荧光寿命为104.2ns，与其跃迁类型和离子价态基本相符。
Abstract
A series of -Ca
2
SiO
4
:
x
Ce
3+
y
Al
3+
yellow phosphors were prepared by high temperature solid-state reactions. The structure
morphology and optical properties of the phosphors were characterized by X-ray diffractometer
scanning electron microscope
laser particle size analyzer
and fluorescence spectrometer. The results show that -Ca
2
SiO
4
and -Ca
2
SiO
4
samples form at 1200~1300℃ and 1350~1500℃
respectively. The structures of Ca
2
SiO
4
don't change with Al
3+
and Ce
3+
doping. The luminescence intensity of -Ca
2
SiO
4
: 0.5%Ce
3+
4%Al
3+
calcined at 1450℃ reaches the maximum. Under the excitation of 450 nm
a broad band emission centered at 565 nm is observed
which mainly corresponds to 5d
2
F
7/2
and 5d
2
F
5/2
transitions of Ce
3+
. The luminescence intensity of phosphor is influenced by temperature
and it decreases by 37% as the temperature increases from room temperature to 475 K. The decay curves of Ce
3+
can be fitted as the single exponential function. The fluorescence lifetime of the phosphor is 104.2 ns
which is basically consistent with the transition types as well as ionic valence of Ce
3+
.
关键词
Ca2SiO4黄色荧光粉发光性能
Keywords
Ca2SiO4yellow phosphorluminescence property
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