期刊
JOURNAL OF MATERIALS SCIENCE
卷 54, 期 8, 页码 6434-6450出版社
SPRINGER
DOI: 10.1007/s10853-019-03350-w
关键词
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资金
- National Natural Science Funds of China [11864038, 51462031]
- Natural Science Foundation of Gansu Province of China [1606RJYA262]
- Scientific Research Projects of Gansu colleges and Universities [2017A-009]
- China Postdoctoral Science Foundation [2016M592909XB]
- Creation of Science and Technology of Northwest Normal University, China [NWNU-LKQN-15-9]
- Fundamental Research Funds for the Central Universities [lzujbky-2017-sp23]
The temperature-dependent fluorescence characteristic is a key index of rare-earth ion-doped functional materials. In this paper, the structure, photoluminescence property, trap distribution and self-healing mechanism are studied in detail by XRD, photoluminescence spectra, decay times, the temperature-dependent fluorescence characteristic and cathodoluminescence spectrum. We developed a multicationic site phosphosilicate phosphor Ca8Al2(PO4)(6)(SiO4): Ce3+, Mn2+ to obtain the luminous self-healing property. In this work, we tried to change the energy and density distributions of traps by designing and adjusting synthesis scheme of target material and finally realized self-suppression of emission declined by energy compensation from traps or energy transfer between Ce3+ and Mn2+. As we expected, photoluminescence intensity of Ce3+ and Mn2+ at 250 degrees C is 40% and 300%, respectively, of their initial intensity at ambient temperature for co-doped representative sample, and it indicates that the emission degeneration of Mn2+ is obviously suppressed with the increase in temperature. A highly thermally sensitive fluorescence intensity ratio is obtained in a broad temperature range, and it implies that this material could be applied to a temperature sensing sensor. The fitting and calculated results show a good signal discriminability with the maximum absolute sensitivity 0.0097K(-1) and maximum relative sensitivity 2.1% K-1, respectively.
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