کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10633020 | 992962 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of Eu3+-activated InVO4 phosphors prepared by sol-gel method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Indium orthovanadate (InVO4) doped with Eu3+ ions had been synthesized by sol-gel method. The precursor of InVO4:Eu3+ powders were heated at 950 °C for 6 h in air, and the crystal structure, surface morphologies and photoluminescence properties were also investigated. XRD patterns indicated that the crystallinity of InVO4:Eu3+ powders decreases with increasing Eu3+ ion concentrations. From the SEM micrographs, the shapes of the InVO4 particles are uniform and like pebbles. With increasing Eu3+ ion concentrations, the shapes of the InVO4:Eu3+ particles become smaller and irregular. In the PL studies, the sharp excitation peaks between 300 and 600 nm correspond to the Eu3+ intra-4f transitions. Excitation at 326 nm in terms of Eu3+ concentrations in (In1âxEux)VO4 powders shows that the (In1âxEux)VO4 phosphors display bright red luminescence at about 615 nm belonging to the 5D0 â 7F2 electric dipole transition, and the time-resolved 5D0 â 7F2 transition presents a single exponential decay behavior. The concentration quenching is active when the Eu3+ concentration is larger than 30 mol%, and the critical distance is about 8.024 Ã
.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 33, Issue 3, January 2011, Pages 375-380
Journal: Optical Materials - Volume 33, Issue 3, January 2011, Pages 375-380
نویسندگان
Yee-Shin Chang, Zhao-Rong Shi, Yeou-Yih Tsai, Sean Wu, Hao-Long Chen,