کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1624273 1516421 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural analysis and vacuum ultraviolet excited luminescence properties of sol–gel derived Y3Al5O12:Eu3+ phosphors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Structural analysis and vacuum ultraviolet excited luminescence properties of sol–gel derived Y3Al5O12:Eu3+ phosphors
چکیده انگلیسی

The structural and luminescence characteristics of sol–gel derived Y3Al5O12:Eu3+ (YAG:Eu3+) phosphors were investigated using synchrotron radiation. VUV-excited luminescence studies reveal that two major excitation peaks formed at 178 and 238 nm are responsible for producing the characteristic red emission of Eu3+ ions. The emission characteristics of the sol–gel derived YAG:Eu3+ phosphors depend significantly on the calcination temperature and cationic ratios. The Rietveld refinement analysis and luminescence studies indicate that increasing either the calcination temperature or the aluminum ion content can result in a more symmetrical anionic environment for Eu3+ ions in the YAG host, thereby enhancing the luminescence of the synthesized phosphors. YAG:Eu3+ phosphors with reduced particle sizes and improved emission characteristics were successfully prepared in this study via controlling the calcination temperature and cationic ratios.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 456, Issues 1–2, 29 May 2008, Pages 57–63
نویسندگان
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