کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399020 | 1392672 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectroscopic properties of Eu3+:KLa(WO4)2 novel red phosphors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Eu3+:KLa(WO4)2 (Eu:KLW) phosphors were prepared through Pechini type sol-gel method. Low temperature synthesis was achieved through polyesterification between citric acid and ethylene glycol during the growth procedure. The properties of phosphors were analysed using X-ray diffractogram (XRD), scanning electron microscopy (SEM), Raman and luminescence spectroscopy. An effective energy transfer from the tungstate matrix to the activator Eu3+ was observed. Intense red emission in Eu:KLW phosphors was observed while excited with f-f transitions of Eu3+. The Judd-Ofelt (J-O) intensity parameters Ω2 and Ω4 were obtained from the emission intensities of 5D0â7F2,4, respectively by taking the magnetic dipole 5D0â7F1 emission band intensity as reference. The CIE colour co-ordinates of the Eu:KLW red phosphors was calculated (x=0.650, y=0.348), which are close to NTSC standard values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 170, Part 2, February 2016, Pages 547-555
Journal: Journal of Luminescence - Volume 170, Part 2, February 2016, Pages 547-555
نویسندگان
K. Kavi Rasu, D. Balaji, S. Moorthy Babu,