کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5401731 | 1392718 | 2012 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of crystal/electronic structure effects on the photoluminescence properties in the BaO-SiO2:Eu2+ systems
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
BaO-SiO2:Eu2+ phosphors with different Ba/Si mole ratio were prepared using a solid-state reaction method, and their crystal structure dependent-photoluminescence properties were investigated. The prepared phosphor powders were characterized using X-ray diffraction (XRD), field-emission electron microscopy (FE-SEM) and fluorescence spectroscopy. The emission band of the Eu2+ activator varied from orange to blue with varying crystal structure of the host materials, which was related to the crystal field splitting of the Eu 5d orbitals. These emission color changes were examined by calculating the electronic band structure properties such as the density of the state. Moreover, the host material with Ba/Si=1 (BaSiO3) for Eu2+, which exhibited a yellow emission when excited with near UV light, was further characterized for enhancing its emission intensity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 132, Issue 2, February 2012, Pages 375-380
Journal: Journal of Luminescence - Volume 132, Issue 2, February 2012, Pages 375-380
نویسندگان
In Sun Cho, Dong Kyun Yim, Chae Hyun Kwak, Jae Sul An, Hee Suk Roh, Kug Sun Hong,