کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1460823 989610 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and luminescent properties of blue-emitting Sr2CeO4 phosphors by high-energy ball milling method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Structural and luminescent properties of blue-emitting Sr2CeO4 phosphors by high-energy ball milling method
چکیده انگلیسی

Sr2CeO4 phosphors were prepared by means of a high-energy ball milling method and sintered at various temperatures. The X-ray diffraction patterns of the as-prepared phosphors confirmed their orthorhombic structure. The FE-SEM images revealed that the Sr2CeO4 phosphors were composed of spherical particles with diameters of less than 2 µm. The excitation spectra showed a broad band which peaks at 299 nm and has a shoulder at 349 nm due to the t1g–f and t1u–f charge transfer states of Ce4+ ions. The emission spectra exhibited a broad blue-emission band with a maximum at 478 nm that originates from the Ce4+–O2− charge transfer transition resulting from the interaction of Ce4+ ion with the neighboring oxide ions. The highest photoluminescence emission intensity was observed when the powder was sintered at 1100 °C. The results of this study indicate that Sr2CeO4 phosphors have the potential to be used in applications such as white light-emitting diodes (WLEDs) and optical display systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 41, Issue 1, Part B, January 2015, Pages 1249–1254
نویسندگان
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