کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5395897 | 1505733 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of luminescent properties of Ca0.3Sr0.7Al2O4:Tb3+,Eu3+ excited using different excitation sources
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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: Investigation of luminescent properties of Ca0.3Sr0.7Al2O4:Tb3+,Eu3+ excited using different excitation sources Investigation of luminescent properties of Ca0.3Sr0.7Al2O4:Tb3+,Eu3+ excited using different excitation sources](/preview/png/5395897.png)
چکیده انگلیسی
The structure and luminescent properties of Tb3+-Eu3+ co-activated Ca0.3Sr0.7Al2O4 powder phosphor prepared via solution combustion (SC) method were investigated. The phosphor was analyzed using UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron (XPS), time of flight secondary ion mass spectroscopy (ToF-SIMS), photoluminescence spectroscopy, synchrotron radiation spectroscopy and cathodoluminescence spectroscopy. In particular, the unintended reduction of Eu3+ to Eu2+ was illustrated from the ToF-SIMS, XPS and luminescent spectroscopy data. This reduction is known to occur under certain conditions and possible mechanisms for the reduction are discussed. The chemical imaging performed with ToF-SIMS illustrated how individual ions were distributed in the crystal. Tunable luminescence was observed when the phosphor was optically-excited by different excitation sources including a 325Â nm He-Cd laser, synchrotron radiation and high energy electrons. This phosphor was evaluated for application in different types of light emitting devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 197, December 2014, Pages 72-79
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 197, December 2014, Pages 72-79
نویسندگان
Samy K.K. Shaat, Hendrik C. Swart, Odireleng M. Ntwaeaborwa,