Luminescence and Energy Transfer of Dual-Emitting Solid Solution Phosphors (Ca,Sr)10Li(PO4)7:Ce3+,Mn2+ for Ratiometric Temperature Sensing

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• 作者：Xinguo ZhangJungu Xu ; Ziying Guo ; Menglian Gong
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2017
• 出版时间：February 1, 2017
• 年：2017
• 卷：56
• 期：4
• 页码：890-898
• 全文大小：755K
• ISSN：1520-5045

文摘

A series of novel dual-emitting solid solution phosphors, (Ca,Sr)₁₀Li(PO₄)₇:Ce³⁺, Mn²⁺ (CSLP:Ce³⁺,Mn²⁺), were synthesized by high-temperature solid-state method. CSLP:Ce³⁺,Mn²⁺ exhibits both Ce³⁺ violet emission and Mn²⁺ red emission under UV excitation. It is found that Sr²⁺ partial substitution of Ca²⁺ could result in enhancement of Mn²⁺ emission intensity and blue-shift of Mn²⁺ emission wavelength, which is due to site symmetry reduction and polyhedron expansion, respectively. The Ce³⁺–Mn²⁺ energy transfer (ET) is efficient (∼90%), and the ET mechanism is dipole–dipole interaction. The application potential of CSLP:Ce³⁺,Mn²⁺ in optical thermometry was studied by exploiting the temperature sensitivity of the fluorescent intensity ratio (violet/red). It is found that the intensity ratio of the Ce³⁺ and Mn²⁺ emission peak linearly related to the temperature from 293 to 473 K with sensitivity of 0.40% K^–1. These results reveal that CSLP:Ce³⁺,Mn²⁺ may be a potential candidate for a luminescent ratiometric thermometer with wide temperature range.