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Sr2+掺杂荧光粉Ca2Nb2O7：Eu3+的发光特性
Photoluminescence Properties of Sr2+ Doped Ca2Nb2O7：Eu3+ Red-emitting Phosphor
- 发光学报 2014年35卷第8期 页码：945-949
- 作者机构：
延边大学理学院 物理系, 吉林 延吉,133002
- 作者简介：
- 基金信息：国家自然科学基金（51272224）();吉林省科技发展计划（2013010135JC）资助项目()
DOI：10.3788/fgxb20143508.0945
中图分类号： O482.31收稿日期：2014-05-02，
修回日期：2014-06-03，
纸质出版日期：2014-08-03
- 稿件说明：
移动端阅览
耿娟, 田莲花,. Sr<sup>2+</sup>掺杂荧光粉Ca<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub>：Eu<sup>3+</sup>的发光特性[J]. 发光学报, 2014,35(8): 945-949
GENG Juan, TIAN Lian-hua,. Photoluminescence Properties of Sr<sup>2+</sup> Doped Ca<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub>：Eu<sup>3+</sup> Red-emitting Phosphor[J]. Chinese Journal of Luminescence, 2014,35(8): 945-949
耿娟, 田莲花,. Sr<sup>2+</sup>掺杂荧光粉Ca<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub>：Eu<sup>3+</sup>的发光特性[J]. 发光学报, 2014,35(8): 945-949 DOI： 10.3788/fgxb20143508.0945.
GENG Juan, TIAN Lian-hua,. Photoluminescence Properties of Sr<sup>2+</sup> Doped Ca<sub>2</sub>Nb<sub>2</sub>O<sub>7</sub>：Eu<sup>3+</sup> Red-emitting Phosphor[J]. Chinese Journal of Luminescence, 2014,35(8): 945-949 DOI： 10.3788/fgxb20143508.0945.
摘要
采用高温固相法制备出Ca
1.97-
x
Sr
x
Nb
2
O
7
：3%Eu
3+
（
x
=0.10，0.50，1.0，1.5，1.97）红色荧光粉，研究了Ca
1.97-
x
Sr
x
Nb
2
O
7
：3%Eu
3+
的发光特性及Sr
2+
的浓度对该荧光粉发光性质的影响。随着Sr
2+
浓度的改变，Ca
2-
x
Sr
x
Nb
2
O
7
：Eu
3+
的XRD呈现不同的相。Ca
1.97
Nb
2
O
7
：3%Eu
3+
（
x
=0）的激发光谱中，302 nm附近的强宽带来自于O
2-
Eu
3+
电荷转移跃迁，272 nm附近的肩峰来自于NbO
7-
6
基团的电荷转移跃迁，350~600 nm范围内的锐锋属于Eu
3+
的特征4f-4f组内跃迁。在398 nm激发下，发射光谱的最强峰位于616 nm，属于Eu
3+
的
5
D
0
7
F
2
电偶极跃迁，发射出强烈的红光。当Ca
2+
逐渐被Sr
2+
取代时，Ca
2-
x
Sr
x
Nb
2
O
7
：Eu
3+
的各激发峰的强度先提高后降低，且O
2-
Eu
3+
电荷转移跃迁发生明显红移。少量Sr
2+
的掺杂可以有效提高Ca
2-
x
Sr
x
Nb
2
O
7
：Eu
3+
的红光发射强度，当
x
=0.01时该荧光粉的红光发射达到最强，可以被紫外LED芯片激发。
Abstract
Sr
2+
doped Ca
2
Nb
2
O
7
:Eu
3+
red-emitting phosphors were synthesized by a high temperature solid-state reaction. The photoluminescence properties of Ca
1.97-
x
Sr
x
Nb
2
O
7
:3%Eu
3+
(
x
=0.10
0.50
1.0
1.5
1.97) and the effect of Sr
2+
concentration on this phosphor were investigated. X-ray diffraction patterns of Ca
1.97-
x
Sr
x
Nb
2
O
7
:3%Eu
3+
show several compositional phase transformations with different Sr
2+
concentration. The excitation spectrum of Ca
1.97
Nb
2
O
7
: 3%Eu
3+
(
x
=0) exhibits a broad band centered at 302 nm corresponding to the charge transfer (CT) transition of O
2-
Eu
3+
. The shoulder peak at 272 nm is attributable to CT transition of NbO
7-
6
. The excitation spectrum also shows several sharp lines of f-f transitions of Eu
3+
from 350 to 600 nm. Excited by 398 nm
Ca
1.97
Nb
2
O
7
:3%Eu
3+
shows an intense red-emitting originated from
5
D
0
7
F
2
transition of Eu
3+
at 616 nm. The intensities of the excitation peaks of Ca
1.97-
x
Sr
x
Nb
2
O
7
:3%Eu
3+
are enhanced firstly and then decrease with the increasing of Sr
2+
content. The CT transitions of O
2-
Eu
3+
have a red shift with the increasing of Sr
2+
content. The doping of a small amount of Sr
2+
can enhance the red-emitting of Ca
1.97
Nb
2
O
7
:3%Eu
3+
and the optimum content is
x
=0.01. The results indicate that Ca
1.97-
x
Sr
x
Nb
2
O
7
:3%Eu
3+
may become a candidate for ultra-violet chip pumped and multi-phosphors converted white LEDs.
关键词
Keywords
references
Blasse G. Structure and Bonding [M]. Berlin: Springer-Verlag Press, 1980:25.
Yin J, Zou Z G, Ye J H. Photophysical and photocatalytic properties of MIn0.5Nb0.5O3 (M=Ca, Sr and Ba) [J]. J. Phys. Chem. B, 2005, 107:61-65.
Hsiao Y J, Fang T H, Ji L W. Photoluminescence and preparation of ZnNb2O6 doped with Eu3+ and Tm3+ nanocrystals for solar cell [J]. Mater. Chem. Phys., 2011, 130:1187-1190.
Fang T H, Hsiao Y J, Chang Y S, et al. Photoluminescent characterization of KNbO3:Eu3+ [J]. Mater. Chem. Phys., 2006, 100:418-422.
Cavalli E, Belletti A, Mahiou R, et al. Luminescence properties of Ba2NaNb5O15 crystals activated with Sm3+, Eu3+, Tb3+ or Dy3+ ions [J]. J. Lumin., 2010, 130:733-736.
Xiao X Z, Yan B. Synthesis and luminescent properties of novel RENbO4:Ln3+ (RE=Y, Gd, Lu; Ln=Eu, Tb) [J]. J. Non-Cryst. Solids, 2005, 351:3634-3639.
Su Y, Peng L, Du C F, et al. Controllable synthesis of undoped and doped calcium niobate nanocrystals for tailored structural, electronic, and luminescenct properties [J]. J. Phys. Chem. C, 2012, 116:15-21.
Yao G, Cheng Y, Wu F, et al. Spectral investigation of Yb-doped calcium pyroniobate crystal [J]. J. Cryst. Growth, 2008, 310:725-730.
Long X F, Han X M. Spectral properties of Nd3+:Ca2Nb2O7 crystal [J]. J. Lumin., 2006, 118:79-82.
Shannon R D. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides [J]. Acta Cryst., 1976, A32:751-767.
Watanabe H, Kijima N. Crystal structure and luminescence properties of SrxCa1-xAlSiN3:Eu2+ mixed nitride phosphors [J]. J. Alloys Compd., 2009, 475:434-439.
Wang F X, Yuan X M, Xie A, et al. Effect of Sr2+ content on luminescence characteristics of Ca0.85-xSrxMoO4:Eu3+0.075,Li+0.075 red-emitting phosphors [J]. J. Chin. Rare Earth Soc.(中国稀土学报), 2011, 29(2):190-194 (in Chinese).
Ishizawa N, Marumo F, Iwai S, et al. Compounds with perovskite-type slabs. Ⅲ. The structure of a monoclinic modification of Ca2Nb2O7 [J]. Acta Cryst., 1980, B36:763-766.
Ishizawa N, Marumo F, Kawamura T, et al. The crystal structure of Sr2Nb2O7, a compound with perovskite-type slabs [J]. Acta Cryst., 1975, B31:1912-1915.
Wiegel M, Hamoumi M, Glasse G. Luminescence and nonlinear optical properties of pervoskite-like niobates and titanates [J]. Mater. Chem. Phys., 1994, 36:289-293.
Geng J, Yu C C, Wu H, et al. Photoluminescence characteristics of red-emitting Eu3+-activated Ca4GdNbMo4O20 phosphor [J]. J. Lumin., 2013, 140:71-13.
Zhao C C, Yin X, Huang F Q, et al. Novel red perovskite phosphor Ca2AlNbO6:Eu3+ for white light-emitting diode application [J]. Phys. B, 2011, 406:4608-4611.
Fu Z L, Fu X H, Sun G J. Preparation and optical properties of red emitting phosphor CaSnO3:Eu3+ for white LED [J]. Chin. J. Lumin.(发光学报), 2011, 32(7):660-664 (in Chinese).
Yang Z P, Zhao Q, Pan F, et al. Synthesis and luminescent properties of CaZn2(PO4)2:Eu3+ phosphor [J]. Chin. J. Lumin.(发光学报), 2011, 32(10):1009-1013 (in Chinese).
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