کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1627609 1516455 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of new red emitting phosphors based on rare earth oxycarbonates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis of new red emitting phosphors based on rare earth oxycarbonates
چکیده انگلیسی
New red emitting phosphors, hexagonal type-II La2O2CO3:Eu3+, Gd2O2CO3:Eu3+, and Y2O2CO3:Eu3+, were synthesized by the simple flux method using the 0.476Li2CO3-0.270Na2CO3-0.254K2CO3 eutectic mixture, and their photoluminescent properties were characterized. The red emission was observed in each sample and their particle sizes were in a submicron scale. The excitation wavelength of their charge transfer bands depended on the difference of the electronegativities of rare earth elements constituting the host lattices. In these phosphors, the highest emission was obtained at the composition of R2O2CO3:7 at.%Eu3+ (R = La, Gd, and Y), and the relative emission intensities compared with that of the commercial Y2O3:Eu3+ phosphor were 23, 27, and 22% for La, Gd, and Y, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 418, Issues 1–2, 20 July 2006, Pages 243-246
نویسندگان
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