کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1618478 1005706 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and luminescent properties of Eu3+-activated molybdate-based novel red-emitting phosphors for white LEDs
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis and luminescent properties of Eu3+-activated molybdate-based novel red-emitting phosphors for white LEDs
چکیده انگلیسی

A series of Eu3+-activated molybdate-based phosphors were synthesized. The experimental results indicate that the concentration quenching does not happen in Eu3+-doped Na0.5Gd0.5MoO4 phosphor and the relative emission intensity enhances with the increase of the Eu3+ doping ratio, which reaches a maximum at 50 at.% of Eu3+. The emission intensity of Na0.5Eu0.5MoO4 is about 2.26 times higher than that of Ca0.8MoO4:Eu0.23+. The introduction of Li+ substituting for Na+ does not change shapes and positions of photoluminescence spectra of Na0.5Eu0.5MoO4 but evidently enhances the emission intensity of Eu3+ under 396 nm excitation and the optimal doping concentration of Li+ is 25 at.%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 501, Issue 1, 2 July 2010, Pages 124–129
نویسندگان
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