کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400267 | 1505911 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoluminescence in Pb2+ activated SrB4O7 and SrB2O4 phosphors
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The powder samples of SrB4O7:Pb2+ and SrB2O4:Pb2+ were prepared by solution combustion synthesis method. The synthesis is based on the exothermic reaction between the fuel (Urea) and Oxidizer (Ammonium nitrate). The synthesized materials were characterized using TG-DTA, powder XRD, SEM and the photoluminescence properties were studied using a Hitachi F-7000 spectrophotometer at room temperature. Both the samples SrB4O7:Pb2+ and SrB2O4:Pb2+ show broad emission of Pb2+ respectively at 307Â nm and 360Â nm (corresponds to 3P1 to 1S0 transition). The optimum concentrations of Pb2+ in both the phosphors SrB4O7:Pb2+ and SrB2O4:Pb2+ were found to be 3Â mol% (relative to Sr) and for this concentration the critical transfer distance R0 were calculated to be 10.21Â Ã
and 12.22Â Ã
respectively. The Stokes shifts were calculated to be respectively 4464Â cmâ1 and 8454Â cmâ1. The emission bands of both the phosphors are in the UV region and the phosphors can be potential candidates for application in UV lamps.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 149, May 2014, Pages 236-239
Journal: Journal of Luminescence - Volume 149, May 2014, Pages 236-239
نویسندگان
A.B. Gawande, J.T. Ingle, R.P. Sonekar, S.K. Omanwar,