کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329931 978934 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Green and red upconversion luminescence in CeO2:Er3+ powders produced by 785 nm laser
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Green and red upconversion luminescence in CeO2:Er3+ powders produced by 785 nm laser
چکیده انگلیسی

CeO2:Er3+ powders were prepared by Pechini type sol–gel method. The structural properties of CeO2:Er3+ were studied by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectra. The results show that CeO2:Er3+ has low phonon cutoff energy, which indicate that CeO2:Er3+ may have high luminescent efficiency. The green and red upconverted luminescence spectra of Er3+ were investigated under excitation into the 4I9/2 level by 785 nm laser. The upconversion mechanisms were studied in detail through laser power dependence and Er3+ ions concentration dependence of upconverted emissions, and results show that excited state absorption and energy transfer process are the possible mechanisms for the upconversion. The upconversion properties indicate that CeO2:Er3+ may be used in upconversion phosphors.

Upconversion spectra of Er3+ doped CeO2 powders with different Er3+ concentration:(a) 0.5% (b) 1% (c) 3% (d) 6%, (λex=785 nm).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 180, Issue 1, January 2007, Pages 127–131
نویسندگان
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