کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9586272 | 1505935 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the role of traps in the BaMgAl10O17:Eu2+ fluorescence mechanisms
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
چکیده انگلیسی
The role of traps on the BaMgAl10O17:Eu2+ phosphor fluorescence mechanism has been investigated. Comparing the fluorescence intensities obtained as a functions of excitation wavelength and temperature, the importance of traps on the quantum yield is demonstrated. The results show that three different processes can be distinguished in the BaMgAl10O17:Eu2+ phosphor fluorescence depending on the temperature and on the excitation wavelength: a quenching from the 5d level of the europium ions due to the temperature (temperature range between 300 and 700Â K), an auto-ionization process of the divalent europium ions (temperature range between 150 and 300Â K) and a quenching due to non-radiative recombination of electron-hole pairs created by VUV excitation during the energy migration (300-700Â K).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 115, Issues 1â2, October 2005, Pages 53-61
Journal: Journal of Luminescence - Volume 115, Issues 1â2, October 2005, Pages 53-61
نویسندگان
G. Bizarri, B. Moine,