期刊
OPTICS EXPRESS
卷 26, 期 17, 页码 21950-21959出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.26.021950
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资金
- National Natural Science Foundation of China (NSFC) [11404171]
- Jiangsu Natural Science Foundation [BK20170101]
- Scientific Research Foundation of Nanjing University of Posts and Telecommunications [NY215174, NY217037, NY218015]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX17_0230]
- Opening Project of State Key Laboratory of Green Building Materials
An efficient soft chemistry method to modify the phase, shape and optical thermometry of NaGdF4:2%Er3+ nano-phosphors through doping Ca2+ ion is reported. With the introduction of Ca2+ , the phase changes from the GdF3:2%Er3+ to NaGdF4:2%Er3+ was achieved, and the shapes of NaGdF4:2%Er3+ were modified from irregular particles to pure hexagonal NaGdF4 microtubes. These modifications derive from the charge redistribution on the nucleus surface through internal electron charge transport between Gd3+ in a lattice and co-doped Ca2+ ion. An obvious enhancement of the total fluorescence intensity was observed after doping the Ca2+ ion. Moreover, an interesting phenomenon was observed that the fluorescence intensity of the mixed GdF3:2%Er3+ and NaGdF4:2%Er3+ was not be quenched at the high temperature more than 473 K. A maximum relative sensitivity of 0.00213/K (416 K) was obtained at 20%Ca2+ doping. These results indicate that NaGdF4:2%Er3+/Ca2+ can be applied in optical temperature sensor. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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