کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11006534 1505858 2018 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Luminescent properties, energy transfer, and thermal stability of double perovskites La2MgTiO6:Sm3+, Eu3+
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Luminescent properties, energy transfer, and thermal stability of double perovskites La2MgTiO6:Sm3+, Eu3+
چکیده انگلیسی
La2MgTiO6 red phosphors doped with both Sm3+ and Eu3+ were prepared by high temperature solid state method. Their phase compositions, morphologies, fluorescence spectra, fluorescence lifetimes and thermal stability were analyzed by X-ray diffraction, scanning electron microscopy, and fluorescence spectroscopy. The optimal synthetic temperature of La2MgTiO6:Sm3+, Eu3+ phosphors was 1400 °C. La2MgTiO6:Eu3+ showed red emission at 615 nm under 396 nm excitation, while La2MgTiO6:Sm3+ showed red orange emission at 601 nm under 406 nm excitation. La2MgTiO6: Sm3+, Eu3+ phosphor showed strong red emission at 615 nm under the excitation of 406 nm. The energy transfer from Sm3+ to Eu3+ in La2MgTiO6: Sm3+, Eu3+ was very effective. The maximum energy transfer efficiency was about 73.5% when Eu3+ concentration was 0.2. The temperature dependent emission spectra showed that the phosphors had good thermal stability. The La1.94MgTiO6:0.06Sm3+, La1.85MgTiO6:0.15Eu3+ and La1.79MgTiO6:0.06Sm3+, 0.15Eu3+ phosphors exhibited color purities close to 100%: 96.26%, 98.05% and 98.95%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 204, December 2018, Pages 457-463
نویسندگان
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