Author:
Liu Hang,Zheng Xingke,Wang Pengcheng,Wang Haiyan,Zhang Yuhong
Abstract
In this work, a comparative study of the upconversion (UC) luminescence properties of
E
r
3
+
−
Y
b
3
+
-co-doped
A
W
O
4
(
A
=
B
a
, Sr, and Ca) scheelite phosphors and
E
r
3
+
−
Y
b
3
+
-co-doped
M
g
W
O
4
wolframite phosphors is reported. Under 980 nm excitation, all the samples emit green and red emissions. The
E
r
3
+
−
Y
b
3
+
-doped
M
g
W
O
4
phosphor has a higher UC emission intensity. Furthermore, the optical temperature sensing properties in
E
r
3
+
−
Y
b
3
+
-co-doped
A
W
O
4
(
A
=
B
a
, Sr, Ca, and Mg) phosphor samples are investigated. The relative sensitivity (
S
r
) based on thermally coupled levels (TCLs) increases gradually with an increase in matrix phonon energy. The absolute sensitivity (
S
a
) values of the samples are accurately predicted by the chemical bonding parameter (
f
c
). The results of the correlation between the UC luminescence properties and the microscopic crystal structure, and the relationship of the temperature sensitivity and the host parameters, provide us with a guiding insight for the selection of a host material with ideal temperature measurement capability.
Funder
National Natural Science Foundation of China
Project of Jilin Provincial Science and Technology Department
Project of Jilin Province Development and Reform Commission
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics
Cited by
2 articles.
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