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1.淮南师范学院 电子工程学院, 安徽 淮南 232038
2.潍坊学院 化学化工与环境工程学院, 山东 潍坊 261061
Published:05 September 2023,
Received:16 March 2023,
Revised:27 March 2023,
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刘芳芳,郑庆华,宋明君等.颜色可调CsLa(WO4)2∶Pr3+荧光粉的光致发光和温度传感特性[J].发光学报,2023,44(09):1570-1580.
LIU Fangfang,ZHENG Qinghua,SONG Mingjun,et al.Photoluminescence and Temperature Sensing Properties of Color-tunable CsLa(WO4)2∶Pr3+ Phosphors[J].Chinese Journal of Luminescence,2023,44(09):1570-1580.
刘芳芳,郑庆华,宋明君等.颜色可调CsLa(WO4)2∶Pr3+荧光粉的光致发光和温度传感特性[J].发光学报,2023,44(09):1570-1580. DOI: 10.37188/CJL.20230055.
LIU Fangfang,ZHENG Qinghua,SONG Mingjun,et al.Photoluminescence and Temperature Sensing Properties of Color-tunable CsLa(WO4)2∶Pr3+ Phosphors[J].Chinese Journal of Luminescence,2023,44(09):1570-1580. DOI: 10.37188/CJL.20230055.
利用高温固相法制备了一系列不同Pr
3+
掺杂浓度的CsLa(WO
4
)
2
荧光粉,测试了X射线衍射(XRD)、漫反射光谱、激发光谱、发射光谱与荧光衰减曲线,讨论了光致发光光谱与浓度、温度的联系,并基于荧光强度比(FIR)技术计算得出温度传感相关参数。CsLa(WO
4
)
2
∶Pr
3+
主要呈现源自
3
P
0
和
1
D
2
能级的发射,对应的最佳掺杂浓度分别为0.03和0.01,经证实电偶极⁃电偶极相互作用导致了浓度猝灭。
3
P
0
与
1
D
2
能级的发射随温度变化趋势不同,这主要归因于Pr
3+
⁃W
6+
的价间电荷迁移(IVCT)、交叉弛豫(CR)和多声子弛豫(MPR)等过程的综合作用。由于上述发射表现出不同的浓度和温度依赖特性,实现了颜色可调谐发光。基于
3
P
1
→
3
H
5
/
3
P
0
→
3
H
4
热耦合能级对和
1
D
2
→
3
H
4
/
3
P
0
→
3
H
4
非热耦合能级对的FIR,计算得到相对灵敏度分别为586.01/
T
2
K
-1
和1 071.78/
T
2
K
-1
,表明该材料在温度传感领域具有潜在应用价值。
A series of CsLa(WO
4
)
2
phosphors with different doping concentrations of Pr
3+
were prepared by the high temperature solid-state method. X-ray diffraction (XRD), diffuse reflectance spectra, excitation spectra, emission spectra and fluorescence decay curves were analyzed. The concentration and temperature-dependent luminescent properties were investigated. The fluorescence temperature sensing parameters were calculated based on the fluorescence intensity ratio (FIR) technique. The optimal doping concentrations of Pr
3+
for the emissions from
3
P
0
and
1
D
2
levels in CsLa(WO
4
)
2
were found to be 0.03 and 0.01, respectively, and it was confirmed that concentration quenching was caused by the dipole-dipole interactions. The emission trends of
3
P
0
and
1
D
2
levels were different with temperature, mainly due to the effects of the cross-over process to Pr
3+
-W
6+
intervalence charge transfer (IVCT) state, cross relaxation process and multiphonon relaxation process. The different concentration and temperature-dependent characteristics of the emissions from
3
P
0
and
1
D
2
levels enabled tunable color emissions. According to the fluorescence intensity ratio (FIR) of
3
P
1
→
3
H
5
/
3
P
0
→
3
H
4
thermally coupled energy levels and
1
D
2
→
3
H
4
/
3
P
0
→
3
H
4
non-thermally coupled energy levels, the calculated relative sensitivities were 586.01/
T
2
·K
-1
and 1 071.78/
T
2
·K
-1
, respectively, indicating the potential application of this material in temperature sensing.
Pr3+CsLa(WO4)2光致发光温度传感荧光强度比(FIR)
Pr3+CsLa(WO4)2photoluminescencetemperature sensingfluorescence intensity ratio (FIR)
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