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南宁师范大学 化学与材料学院,广西天然高分子化学与物理重点实验室,广西 南宁 530001
Received:16 December 2021,
Revised:29 December 2021,
Published:01 April 2022
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Gui LIN, Qi LUO, Qian CHEN, et al. Preparation and Luminescent Properties of ZnAl2O4/CaAl12O19∶Mn4+ Phosphors[J]. Chinese journal of luminescence, 2022, 43(4): 536-544.
Gui LIN, Qi LUO, Qian CHEN, et al. Preparation and Luminescent Properties of ZnAl2O4/CaAl12O19∶Mn4+ Phosphors[J]. Chinese journal of luminescence, 2022, 43(4): 536-544. DOI: 10.37188/CJL.20210395.
采用传统高温固相法制备了系列
x
ZnAl
2
O
4
/CaAl
12
O
19
∶Mn
4+
(
x
ZAO/CAO∶Mn
4+
)混合相红光荧光粉,研究了ZnAl
2
O
4
掺杂对CaAl
12
O
19
∶Mn
4+
形貌和发光性能的影响。X射线衍射(XRD)表征结果表明,在1 723 K下煅烧6 h成功合成了
x
ZAO/CAO∶Mn
4+
混合相荧光粉,随着ZnAl
2
O
4
掺杂量的增加依然保持两相共存。荧光光谱分析表明,当
x
=1时,ZAO/CAO∶Mn
4+
具有最大的荧光强度,其值比CaAl
12
O
19
∶Mn
4+
的荧光强度提高了203%。相对于CaAl
12
O
19
∶Mn
4+
荧光粉,ZAO/CAO∶Mn
4+
荧光粉具有更长的荧光寿命,其内量子效率提高了211%。在298~418 K温度范围内,ZAO/CAO∶Mn
4+
荧光粉的绝对灵敏度(
S
a
)为4.32×10
-3
K
-1
;在418 K时,最大相对灵敏度(
S
r
)为3.65×10
-3
K
-1
。该荧光粉在光学测温方面具有潜在应用价值。
A series of
x
ZnAl
2
O
4
/CaAl
12
O
19
∶Mn
4+
(
x
ZAO/CAO∶Mn
4+
) mixed-phase red-emit phosphors were prepared by traditional high-temperature solid-state method. The influence of ZnAl
2
O
4
doping on the morphology and luminescence properties of CaAl
12
O
19
∶Mn
4+
was investigated. The X-ray diffraction(XRD) characterization results show that the mixed-phase phosphors were successfully synthesized after sintered at 1 723 K for 6 h
and the two-phase coexistence is maintained with the increase of ZnAl
2
O
4
doping amount. Fluorescence spectrum shows that ZAO/CAO∶Mn
4+
has the largest fluorescence intensity when
x
=1
which is 203% higher than that of CaAl
12
O
19
∶Mn
4+
. Compared with CaAl
12
O
19
∶Mn
4+
phosphor
the lifetime of ZAO/CAO∶Mn
4+
is improved and internal quantum yield of ZAO/CAO∶Mn
4+
is 211% higher than that of CaAl
12
O
19
∶Mn
4+
. An absolute sensitivity(
S
a
) of 4.32×10
-3
K
-1
of the ZAO/CAO∶Mn
4+
phosphor was obtained in the range of 298-418 K and the maximum relative sensitivity(
S
r
) was 3.65×10
-3
K
-1
at 418 K
implying that it has potential application value in optical thermometry.
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