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1. 大连民族大学 物理与材料工程学院,辽宁 大连,116600
2. 发光学及应用国家重点实验室 中国科学院长春光学精密机械与物理研究所,吉林 长春,130033
纸质出版日期:2017-9-5,
网络出版日期:2017-6-6,
收稿日期:2017-1-22,
修回日期:2017-3-11,
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过诚, 丛妍, 董斌等. (Zn<sub>1-<em>x</em></sub>,Mg<sub><em>x</em></sub>)<sub>2</sub>GeO<sub>4</sub>:Mn<sup>2+</sup>的荧光以及长余辉发光性能[J]. 发光学报, 2017,38(9): 1161-1166
GUO Cheng, CONG Yan, DONG Bin etc. Photoluminescence and Long-lasting Phosphorescence Characteristics of (Zn<sub>1-<em>x</em></sub>,Mg<sub><em>x</em></sub>)<sub>2</sub>GeO<sub>4</sub>:Mn<sup>2+</sup>[J]. Chinese Journal of Luminescence, 2017,38(9): 1161-1166
过诚, 丛妍, 董斌等. (Zn<sub>1-<em>x</em></sub>,Mg<sub><em>x</em></sub>)<sub>2</sub>GeO<sub>4</sub>:Mn<sup>2+</sup>的荧光以及长余辉发光性能[J]. 发光学报, 2017,38(9): 1161-1166 DOI: 10.3788/fgxb20173809.1161.
GUO Cheng, CONG Yan, DONG Bin etc. Photoluminescence and Long-lasting Phosphorescence Characteristics of (Zn<sub>1-<em>x</em></sub>,Mg<sub><em>x</em></sub>)<sub>2</sub>GeO<sub>4</sub>:Mn<sup>2+</sup>[J]. Chinese Journal of Luminescence, 2017,38(9): 1161-1166 DOI: 10.3788/fgxb20173809.1161.
采用高温固相法制备了一系列(Zn
1-
x
,Mg
x
)
2
GeO
4
:Mn
2+
(0
x
0.25)绿色荧光粉,并研究了Mg离子对(Zn
1-
x
,Mg
x
)
2
GeO
4
:Mn
2+
的结构、荧光以及长余辉发光性能的影响。Mg离子取代Zn进入Zn
2
GeO
4
晶格,形成(Zn
1-
x
,Mg
x
)
2
GeO
4
固溶体,并产生了晶格畸变。光谱分析结果表明,样品中位于533 nm的绿色荧光源于Mn
2+
的
4
T
1
(
4
G)
6
A
1
(
6
S)跃迁。随着Mg离子浓度的增加,(Zn
1-
x
,Mg
x
)
2
GeO
4
:Mn
2+
样品的激发光谱出现了蓝移现象,说明Mg离子进入到Zn
2
GeO
4
晶格中对其晶格结构产生了影响,导致(Zn
1-
x
,Mg
x
)
2
GeO
4
的带宽发生改变。发射光谱则表明Mg离子进入Zn
2
GeO
4
晶格引起Mn
2+
的
4
T
1
(
4
G)
6
A
1
(
6
S)跃迁绿色荧光发光强度的增强。Zn
2
GeO
4
基质中的氧空位缺陷陷阱深度由于基质带宽的变化而变深,样品具有良好的长余辉发光效果。通过热释光谱分析研究了材料中缺陷陷阱的特征,进一步证实了(Zn
1-
x
,Mg
x
)
2
GeO
4
中缺陷陷阱深度发生改变。根据光谱分析结果给出了(Zn
1-
x
,Mg
x
)
2
GeO
4
:Mn
2+
中荧光与余辉发光的产生机理。
(Zn
1-
x
Mg
x
)
2
GeO
4
:Mn
2+
(0
x
0.25) green phosphors were synthesized by the conventional solid-state reaction
and the effect of Mg incorporation on photoluminescence (PL) and long-lasting phosphorescence (LLP) characteristics of Zn
2
GeO
4
:Mn
2+
was systematically studied. The emission spectrum shows a broad emission band centered at 533 nm
which can be assigned to the
4
T
1
(
4
G)
6
A
1
(
6
S) transitions of Mn
2+
ion. The emission intensity can be increased by the resonant transfer from a subbandgap state in the host to Mn
2+
and the PLE spectra of (Zn
1-
x
Mg
x
)
2
GeO
4
:Mn
2+
exhibit a blue shift with the increasing of Mg concentration. Thermoluminescence (TL) spectra indicate that the introduction of Mg into the host deepened the Vo traps
resulting in the enhanced phosphorescence of Mn
2+
. The possible mechanism of the PL and LLP was discussed based on the PL and TL results.
长余辉发光(Zn1-xMgx)2GeO4:Mn2+热释光
long-lasting phosphorescence(Zn1-xMgx)2GeO4:Mn2+thermoluminescence
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苏锵, 李成宇, 吕玉华. 具有记忆存储功能的长余辉和光激励长余辉玻璃和玻璃陶瓷的制备方法:中国, CN1378987A[P]. 2002-11-13. SU Q, LI C Y, LV Y H. Process for preparing long-afterglow and light excited long-afterglow glass and pyroceram with memory function:China, CN1378987A[P]. 2002-11-13. (in Chinese)
DONG X L, ZHANG J H, ZHANG X, et al.. Photostimulated luminescence of Sr3Al2O5Cl2:Eu2+, Tm3+ with a large energy storage capacity[J]. J. Lumin., 2014, 145:657-660.
LIU Z S, JING X P, WANG L X. Luminescence of native defects in Zn2GeO4[J]. J. Electrochem. Soc., 2007, 154(6):H500-H506.
GAO G J, WONDRACZEK L. Near-infrared down-conversion in Mn2+-Yb3+ co-doped Zn2GeO4[J]. J. Mater. Chem. C, 2013, 1(10):1952-1958.
CONG Y, LI B, YUE S M, et al.. Enhanced red phosphorescence in MgGeO3:Mn2+ by addition of Yb3+ ions[J]. J. Electrochem. Soc., 2009, 156(4):H272-H275.
ZHANG Q H, WANG J. Synthesis and characterization of Zn2GeO4:Mn2+ phosphor for field emission displays[J]. Appl. Phys. A, 2012, 108(4):943-948.
SHANG M M, LI G G, YANG D M, et al.. Luminescence properties of Mn2+-doped Li2ZnGeO4 as an efficient green phosphor for field-emission displays with high color purity[J]. Dalton Trans., 2012, 41(29):8861-8868.
ANOOP G, MINI KRISHNA K, JAYARAJ M K. The effect of Mg incorporation on structural and optical properties of Zn2GeO4:Mn phosphor[J]. J. Electrochem. Soc., 2008, 155(1):J7-J10.
LEI B F, LI B, ZHANG H R, et al.. Synthesis and luminescence properties of cube-structured CaSnO3/RE3+(RE=Pr, Tb) long-lasting phosphors[J]. J. Electrochem. Soc., 2007, 154(7):H623-H630.
WAN M H, WANG Y H, WANG X S, et al.. Long afterglow properties of Eu2+/Mn2+ doped Zn2GeO4[J]. J. Lumin., 2014, 145:914-918.
CONG Y, HE Y Y, DONG B, et al.. Long afterglow properties of Zn2GeO4:Mn2+, Cr3+ phosphor[J]. Opt. Mater., 2015, 42:506-510.
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IHARA M, IGARASHI T, KUSUNOKI Y, et al.. Cathodoluminescence and photoluminescence of nanocrystal phosphors[J]. J. Electrochem. Soc., 2002, 149(3):H72-H75.
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