کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402697 | 1392739 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multiplication of electronic excitations in nanophosphors Lu2O3:Eu3+ and Lu2O3:Tb3+
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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: Multiplication of electronic excitations in nanophosphors Lu2O3:Eu3+ and Lu2O3:Tb3+ Multiplication of electronic excitations in nanophosphors Lu2O3:Eu3+ and Lu2O3:Tb3+](/preview/png/5402697.png)
چکیده انگلیسی
Luminescence properties of Lu2O3:Eu3+ and Lu2O3:Tb3+ nanocrystalline powders with the particle size varying from 46 to 6Â nm were studied under excitation by synchrotron radiation in the photon energy range (up to â¼22.5Â eV) covering the region where the processes of multiplication of electronic excitation occur. It was found that the excitation spectra of Tb3+ emission from all Lu2O3:Tb3+ nanopowders have similar behavior, whereas the shape of the excitation spectra of Eu3+ emission from Lu2O3:Eu3+ nanopowders strongly depends on the particle size. The difference in the behavior of Lu2O3:Eu3+ and Lu2O3:Tb3+ nanophosphor systems was explained by different mechanisms of the energy transfer from the host to Eu3+ or Tb3+ ions (either the hole or electron recombination mechanism, respectively), which are differently influenced by losses of electronic excitations near the particle surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 129, Issue 12, December 2009, Pages 1711-1714
Journal: Journal of Luminescence - Volume 129, Issue 12, December 2009, Pages 1711-1714
نویسندگان
Vladimir N. Makhov, Cheslav Lushchik, Aleksandr Lushchik, Marco Kirm, Zhi-Fang Wang, Wei-Ping Zhang, Min Yin, Jing-Tai Zhao,