کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402351 | 1392732 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoluminescence properties of nanocrystalline La2TeO6:Eu3+ phosphor prepared by Pechini sol-gel method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
La2TeO6:Eu3+ nanophosphors were prepared by Pechini sol-gel process, using lanthanide nitrates and telluric acid as precursor. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TG), photoluminescence spectra (PL) and fluorescence lifetime were used to characterize the resulting phosphors. The results of XRD indicate that all samples crystallized completely at 1023Â K and are isostructural with the orthorhombic La2TeO6. SEM study reveals that the samples have a strong tendency to form agglomerates with an average size ranging from 50 to 80Â nm. The photoluminescence intensity and chromaticity were improved for excitation at 254 and 395Â nm. The optimized phosphor La1.80Eu0.10TeO6 could be considered as an efficient red-emitting phosphor for solid-state lighting devices based on GaN LEDs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 130, Issue 7, July 2010, Pages 1124-1127
Journal: Journal of Luminescence - Volume 130, Issue 7, July 2010, Pages 1124-1127
نویسندگان
Jaime Llanos, Rodrigo Castillo,