کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403040 | 1392750 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
TL and PL studies on defect-assisted green luminescence from doped strontium sulfide phosphor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: TL and PL studies on defect-assisted green luminescence from doped strontium sulfide phosphor TL and PL studies on defect-assisted green luminescence from doped strontium sulfide phosphor](/preview/png/5403040.png)
چکیده انگلیسی
Defect-assisted luminescence of Pr3+-doped SrS has been investigated and reported in this paper. The polycrystalline sample of phosphor was prepared by conventional solid-state reaction method and checked for crystallization and phase by X-ray diffraction study. The thermally stimulated luminescence studies of the phosphor samples with various activator concentrations, irradiated by a blacklight source, are conducted and show a broad single peak around 365-382Â K. Computerized glow curve deconvolution tool is used to evaluate the effective trapping parameters and suggests quasi-continuous distribution of traps in the range of 0.5â0.9Â eV. A critical survey on the application of first-order kinetics in the present phosphor is undertaken. Photoluminescence studies reveal three excitation bands at 287, 314, 355Â nm and defect-related emission at 517, 494Â nm for two concentrations of activator atoms in the present phosphor. The 314-355Â nm broad excitation bands correspond to a charge transfer transition of Pr3+-S2â.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 128, Issue 10, October 2008, Pages 1587-1594
Journal: Journal of Luminescence - Volume 128, Issue 10, October 2008, Pages 1587-1594
نویسندگان
Shreyas S. Pitale, Suchinder K. Sharma, R.N. Dubey, M.S. Qureshi, M.M. Malik,