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1. 中国科学院长春光学精密机械与物理研究所 激发态物理重点实验室,吉林 长春,130033
2. 井冈山大学 数理学院,江西 吉安,343009
3. 吉林大学电子科学与工程学院 集成光电子国家重点实验室,吉林 长春,130012
4. 空军航空大学,吉林 长春,130022
收稿日期:2009-02-25,
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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曹春燕, 秦伟平, 张继森, 等. Y0.795-xGdxYb0.2Tm0.005F3纳米晶合成及 Tm3+和Gd3+的上转换发光[J]. 发光学报, 2009,30(6):738-743.
CAO Chun-yan, QIN Wei-ping, ZHANG Ji-sen, et al. Synthesis and Up-conversion Emission Properties of Y0.795-xGdxYb0.2Tm0.005F3 Nanocrystals[J]. Chinese journal of luminescence, 2009, 30(6): 738-743.
曹春燕, 秦伟平, 张继森, 等. Y0.795-xGdxYb0.2Tm0.005F3纳米晶合成及 Tm3+和Gd3+的上转换发光[J]. 发光学报, 2009,30(6):738-743. DOI:
CAO Chun-yan, QIN Wei-ping, ZHANG Ji-sen, et al. Synthesis and Up-conversion Emission Properties of Y0.795-xGdxYb0.2Tm0.005F3 Nanocrystals[J]. Chinese journal of luminescence, 2009, 30(6): 738-743. DOI:
利用水热法合成了氟化物Y
0.795-x
Gd
x
Yb
0.2
Tm
0.005
F
3
(x=0.0
0.1
0.2
0.5
0.8)纳米晶。研究了退火后系列样品的上转换发光性质以及激发态辐射跃迁寿命。在980 nm激发下
Y
0.795-x
Gd
x
Yb
0.2
Tm
0.005
F
3
纳米微晶样品中观察到了Tm
3+
的蓝光上转换发射及紫色、紫外发射增强现象
同时还观察到Gd
3+
的
6
D
9/2
、
6
I
J
、
6
P
5/2
及
6
P
7/2
到基态
8
S
7/2
的发射。实验结果表明:样品半个波长量级的颗粒尺寸是Tm
3+
紫外上转换增强以及Tm
3+
到Gd
3+
发生有效能量传递的重要因素。
Y
0.795-x
Gd
x
Yb
0.2
Tm
0.005
F
3
nanocrystals were synthesized through a hydrothermal method. After annealing in the air conditions
the upconversion (UC) emission properties under a 980 nm continuous wave semiconductor laser diode excitation were studied. The experimental results suggested that the violet and ultraviolet (UV) UC emission enhancement were observed in Y
0.795-x
Gd
x
Yb
0.2
Tm
0.005
F
3
nanocrystals
as well as the UC emissions from
6
D
9/2
6
I
J
6
P
5/2
and
6
P
7/2
states to the ground state
8
S
7/2
of Gd
3+
were shown
too. The luminescent kinetic analysis implied that
under 980 nm excitation
Yb
3+
can transfer energy to populate the
3
P
2
level of Tm
3+
make UV
violet
and blue UC emissions obtained
further
the
6
I
J
multiplets of Gd
3+
were populated through the energy transfer process
3
P
2
→
3
H
6
(Tm
3+
):
8
S
7/2
→
6
I
J
(Gd
3+
). At the same time
the energy transfer processes occurred between Gd
3+
and Yb
3+
or Tm
3+
based on the energy matching conditions
leading to the above mentioned UV UC emissions of Gd
3+
.
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