کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10714307 | 1025585 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of dopant concentrations and firing temperatures on decay kinetics of manganese doped willemite nanopowders
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of dopant concentrations and firing temperatures on decay kinetics of manganese doped willemite nanopowders Effects of dopant concentrations and firing temperatures on decay kinetics of manganese doped willemite nanopowders](/preview/png/10714307.png)
چکیده انگلیسی
Nanocrystallline willemite, Zn2âxMnxSiO4 (0.5â¤xâ¤5 mol%), doped with variable concentration of divalent manganese ions, phosphor powders were prepared using the simple wet-chemical sol-gel method combined with furnace firing at 800, 900, and 1000 °C. X-ray diffraction (XRD) and high resolution X-ray photoelectron (HR-XPS) scans confirm the presence of willemite phase of Zn2SiO4. Laser-induced phosphorescence decay measurements of Zn2âxMnxSiO4 nanophosphors were investigated using high peak power pulsed UV nitrogen laser (λ=337.1 nm). The decay curves show non-single exponential behavior with long term decay rate. Various parameters describing the strength of optical transitions in atoms and molecules such as, Einstein's A and B coefficients, 'f', integrated cross-section, and transition dipole moment values have been calculated. The long term decay rate of optical transition parameters was found to be somewhat temperature and concentration dependent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 406, Issue 22, 15 November 2011, Pages 4188-4194
Journal: Physica B: Condensed Matter - Volume 406, Issue 22, 15 November 2011, Pages 4188-4194
نویسندگان
Poonam Sharma, Harbhajan S. Bhatti,