کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10148025 | 1646512 | 2018 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reliable temperature sensing based on intense green upconversion emissions of Y2Mo4O15:Yb3+,Er3+ under 980â¯nm excitation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, Y2Mo4O15:Yb3+/Er3+ upconversion phosphors are prepared by a co-precipitation method. In the case of 20% Yb3+ doping, the intense green upconversion luminescence is obtained, which can be attributed to the energy transfer from Yb3+-MoO42- dimer to Er3+ that suppresses the multi-phonon relaxation of 4I11/2 to 4I13/2. Similar the Yb3+ sensitization, the dimer sensitization is also dependent on the Yb3+ concentration. When the Yb3+ concentration exceeds 20%, the luminescence is quenched by the cross relaxation and energy migration between dimers. A method for evaluating the reliability of temperature measurement standards is reported. Moreover, in term of the reliable temperature scale, the maximum absolute sensitivity of sample doped with 20% Yb3+ is determined to be 0.0117â¯K-1. Favorable sensing ability and strong upconversion luminescence indicate that the optimum sample is potentially applicable as the optical thermometric materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 550, 1 December 2018, Pages 145-153
Journal: Physica B: Condensed Matter - Volume 550, 1 December 2018, Pages 145-153
نویسندگان
Wenbo Peng, Tao Pang,