کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1314631 1499360 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and upconversion luminescence properties study of NaYbF4:Tm3+ crystals with different dopant concentration
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis and upconversion luminescence properties study of NaYbF4:Tm3+ crystals with different dopant concentration
چکیده انگلیسی

Tm3+ ion doped α-NaYbF4 nanocrystals (NCs) and β-NaYbF4 microcrystals (MCs) were prepared by one-step hydrothermal method through tuning pH values. Through the comparative study on the crystal growth mechanism guided by two different organic additives, the effect of Na+ cation on morphologies was discussed. Under 980-nm excitation, intense ultraviolet (UV) and blue upconversion (UC) emissions were observed from both of them. The UC luminescence properties of the as-prepared MCs were studied based on changing the Tm3+ ion concentrations. The fluorescent lifetimes of MCs doped with different amount of Tm3+ ions indicate that the obtained NaYbF4:Tm3+ MC was an excellent matrix for UV UC emissions.

Tm3+ ion doped α-NaYbF4 nanocrystals (NCs) and β-NaYbF4 microcrystals (MCs) were prepared by one-step hydrothermal method through tuning pH values. Through the comparative study on the crystal growth mechanism guided by two different organic additives, the effect of Na+ cation on morphologies was discussed. Under 980-nm excitation, intense ultraviolet (UV) and blue upconversion (UC) emissions were observed from both of them. The UC luminescence properties of the as-prepared MCs were studied based on changing the Tm3+ ion concentrations. The fluorescent lifetimes of MCs doped with different amount of Tm3+ ions indicate that the obtained NaYbF4:Tm3+ MC was an excellent matrix for UV UC emissions.Figure optionsDownload as PowerPoint slideHighlights
► Tm3+ doped NaYbF4 crystals emitted intense UV UC and weak visible UC emissions.
► The affect of Na+ cation on the morphologies was discussed.
► The appropriate Tm3+ concentration for the strongest UV UC emissions was found.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluorine Chemistry - Volume 140, August 2012, Pages 70–75
نویسندگان
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