کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9586116 | 1505937 | 2005 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On BaMgAl10O17:Eu2+ phosphor degradation mechanism: thermal treatment effects
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: On BaMgAl10O17:Eu2+ phosphor degradation mechanism: thermal treatment effects On BaMgAl10O17:Eu2+ phosphor degradation mechanism: thermal treatment effects](/preview/png/9586116.png)
چکیده انگلیسی
Fluorescence characteristics degradation mechanisms of plasma display panels (PDP) phosphor during panel fabrication and during panel life are not yet fully clarified. We present here the mechanism of luminance decrease in blue-emitting BaMgAl10O17:Eu2+ phosphor due to the baking process, one step of the panel fabrication. It was shown experimentally that annealing in air leads to the oxidation of the dopant. It was demonstrated that during the oxidation process the decrease of divalent europium concentration is followed by an increase in the trivalent europium concentration but also by a decrease in the traps concentration. Based on these results and a numerical simulation, we proposed a model of the oxidation process. The degradation is due to three different mechanisms: the adsorption of an oxygen atom of the atmosphere into an oxygen vacancy of the surface phosphor, the diffusion of divalent europium ions along the conduction layer of BAM and the transfer of one electron from dopant ions to adsorbed oxygen ions when the divalent europium ions are close to adsorbed oxygen ions. We also develop two different solutions to stop or to minimize the degradation due to the baking process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 113, Issues 3â4, June 2005, Pages 199-213
Journal: Journal of Luminescence - Volume 113, Issues 3â4, June 2005, Pages 199-213
نویسندگان
G. Bizarri, B. Moine,