کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5442953 1510773 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Europium(III)-doped A2Hf2O7 (A = Y, Gd, Lu) nanoparticles: Influence of annealing temperature, europium(III) concentration and host cation on the luminescent properties
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Europium(III)-doped A2Hf2O7 (A = Y, Gd, Lu) nanoparticles: Influence of annealing temperature, europium(III) concentration and host cation on the luminescent properties
چکیده انگلیسی
The detailed analyses of structure and luminescence of europium(III)-doped A2Hf2O7 (A = Y, Gd, Lu) nanoparticles is presented. Samples were prepared by time and cost effective combustion method that utilize polyethylene glycol both as a chelating agent and as a fuel, with different europium(III) concentrations (from 1 to 12 at.%), annealed at temperatures ranging from 800 to 1400 °C, and with alternating A3+ cation in the A2Hf2O7 host. Then, structural variations between materials were analysed by X-ray diffraction and structural refinement, while the changes in the luminescence were assessed from the Judd-Ofelt analyses of emission spectra. Nanoparticles prepared at the lowest temperature (800 °C) had the smallest particle size of ∼6 nm and showed the highest quantum efficiency when doped with 1 and 2 at.% of europium(III). Radiative transition rate and quantum efficiency of emission showed Lu2Hf2O7 > Gd2Hf2O7 > Y2Hf2O7 trend.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 61, November 2016, Pages 68-76
نویسندگان
, , , , , ,