کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1607562 1516240 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and photoluminescence of multicolor tunable K3Gd(VO4)2:Eu3+ phosphors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis and photoluminescence of multicolor tunable K3Gd(VO4)2:Eu3+ phosphors
چکیده انگلیسی
Eu3+-activated novel potassium gadolinium double vanadates K3Gd(VO4)2 phosphors have been synthesized via solid-state reaction. The crystal phase, surface morphology and photoluminescence properties of the phosphor were investigated. X-ray diffraction results demonstrate that K3Gd1−xEux(VO4)2 has the monoclinic structure with the space group of p21/m(11). The emission spectra suggest that K3Gd1−xEux(VO4)2 phosphors present an intense charge transfer band at 314 nm and a strong red emission of Eu3+ (5D0 → 7F2 transition) at 617 nm. The optimum doping concentration of Eu3+ ions in K3Gd1−xEux(VO4)2 phosphors is around 50 mol% and the major mechanism for concentration quenching is the exchange interaction. The emitting light color of the phosphors can be tunable by varying excitation wavelength and a warm white light is achieved by the excitation at 337 nm. The luminescence properties suggest that the present phosphors may have potential applications as red and white emitting materials for w-LEDs in solid state lighting.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 653, 25 December 2015, Pages 315-320
نویسندگان
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