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1. 中国科学技术大学国家同步辐射实验室,安徽 合肥,230029
2. 稀土冶金及功能材料国家工程研究中心,内蒙古 包头,014030
3. 包头稀土研究院, 内蒙古 包头 014030
收稿日期:2009-02-06,
修回日期:1900-01-02,
网络出版日期:2009-12-30,
纸质出版日期:2009-12-30
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李 波, 沈雷军, 周永勃, 等. YVO4·xTiO2 : Eu3+荧光粉的发光性质[J]. 发光学报, 2009,30(6):758-762.
LI Bo, SHEN Lei-jun, ZHOU Yong-bo, et al. Luminescent Properties of YVO4·xTiO2 : Eu3+[J]. Chinese journal of luminescence, 2009, 30(6): 758-762.
采用高温固相方法合成了YVO
4
·
x
TiO
2
: Eu
3+
(
x
=0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9)粉末状发光材料
经X射线衍射分析结构发现材料为两相共存。一相为YVO
4
属四方锆英石结构;另一相为Y
2
Ti
2
O
7
属立方烧绿石结构。研究了YVO
4
·
x
TiO
2
: Eu
3+
在UV及VUV激发下的光谱性质
讨论了Ti 的掺杂对材料发光性能的影响
发现适量的Ti的掺入可以提高材料 基质对UV及VUV的吸收。在UV及VUV激发下
YVO
4
·
x
TiO
2
: Eu
3+
荧光粉的发射光谱主峰在616 nm和619 nm
证明Eu
3+
占据了晶格中非反演对称中心的位置。在YVO
4
·
x
TiO
2
: Eu
3+
的激发光谱中
有一中心位于155 nm的吸收带
它属于基质的吸收带。
The samples of YVO
4
·
x
TiO
2
: Eu
3+
(
x
=0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9) were synthesized by the conventional solid state reaction. The structure of prepared sample was measured by X-ray diffraction(XRD) at room temperature. XRD measurements confirmed that the prepared YVO
4
·
x
TiO
2
: Eu
3+
is consisted of two phases. One phase is YVO
4
with the tetragonal according to JCPDS-Card (42-0413)
the other phase is Y
2
Ti
2
O
7
with the cubic pyrochlore according to JCPDS-Card (17-0341). Spectroscopic properties of the sample were studied under the UV/VUV excitation. The effects of Ti doping on the luminescent properties of the sample were investigated and it was found that reasonable Ti doping can highlight the absorption of matrix in UV/VUV rang. The emission spectrum is dominated by the red peaks at 616 nm and 619 nm due to the electric dipole transition
5
D
0
→
7
F
2
of Eu
3+
. It indicated that Eu
3+
occupies a site lacking inversion symmetry. There is one band peaked at 155 nm in the excitation spectrum of the sample
it could be assigned to the absorption of the host.
. Liu Duanyang, He Dawei, Kang Kai, et al. VUV spectra properties of (Y,Gd)Al3(BO3)4 : Tb [J]. Spectroscopy and Spectral Analysis (光谱学与光谱分析), 2005, 25 (7):1034-1037 (in Chinese).
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. Zhang Weiwei, Xie Pingbo, ZhangWeiping, et al. Crystal structure and luminescence of the orthoborate Ln1-xBO3 : Eux(Ln=Y, Gd) [J]. Chin. J. Inorg. Mater.(无机材料学报), 2001, 16 (1):9-16 (in Chinese).
. Jiang Xiaocheng, Yan Chunhua, Sun Lindong, et al. Hydrothermal homogeneous urea precipitation of hexagonal YBO3 : Eu3+ nanocrystals with improved luminescent properties [J]. J. Sol. Stat. Chem., 2003, 175 (2):245-251.
. Zhao Xiaoxia, Xie Yihua, Wang Xiaojun, et al. Luminescence properties of (Y,Gd)(P,V)O4 : Eu3+ [J]. Chin. J. Lumin.(发光学报), 2006, 27 (2):196-200 (in Chinese).
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