کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5491812 1525128 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optical temperature sensing properties of Yb3+/Er3+ codoped LaF3 upconversion phosphor
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Optical temperature sensing properties of Yb3+/Er3+ codoped LaF3 upconversion phosphor
چکیده انگلیسی
The structural and optical properties of Er3+/Yb3+ codoped LaF3 phosphors are investigated using X-ray diffraction (XRD) and upconversion luminescence spectra. The result shows that the hexagonal phase of LaF3 keep stability at temperature lower than 800 °C in air condition and will be oxidized to be LaOF at higher temperature. Its upconversion emission intensity varies with the doping concentrations of Yb3+ ions and reaches a maximum at around 7 mol% Yb3+. The power-dependent luminescence reveals the possible emission mechanisms and the corresponding upconversion processes. Furthermore, the optical temperature sensing properties of LaF3: Er3+/Yb3+ are studied based on the fluorescence intensity ratio (FIR) technique for two thermally coupled levels (2H11/2 and 4S3/2) of Er3+. The maximum sensitivity is found to be about 0.00157 K−1 at 386 K, revealing this phosphor to be a promising prototype for applications in optical temperature sensing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 521, 15 September 2017, Pages 270-274
نویسندگان
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