کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403355 | 1392758 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced luminescent properties of Y3Al5O12:Tb3+,Ce3+ phosphor prepared by spray pyrolysis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Yttrium aluminum garnet (YAG) particles doped with Tb3+ or double doped with Tb3+ and Ce3+ were prepared by spray pyrolysis and characterized by photo- and cathode-luminescence. It was tried to incorporate a broad band of Ce3+ activator into the line peaks of Tb3+ in YAG host without the reduction of emission intensity. Ce-codoped YAG:Tb particles showed a broad band emission due to the d-f transition of Ce3+ and a reduction in the intensity of emission peaks due to 5D3-7Fj (j=3, 4, 5, 6) transition of Tb3+ when they were excited by the ultraviolet light of 270Â nm. These results supported that an effective energy transfer occurs from Tb3+ to Ce3+ in YAG host. Codoping Ce3+ ions greatly intensified the excitation peak at 270Â nm for the emission at 540Â nm of Tb3+, which means that more lattice defects, involving in the energy absorption and transfer to Tb3+, are formed by the Ce3+ codoping. The finding gives a promising approach for enhancing the luminescence efficiency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 126, Issue 2, October 2007, Pages 469-474
Journal: Journal of Luminescence - Volume 126, Issue 2, October 2007, Pages 469-474
نویسندگان
Kyeong Youl Jung, Hyun Woo Lee,