کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400481 | 1505917 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Power dependence of upconversion luminescence of Er3+ doped Yttria nanocrystals and their bulk counterpart
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
We demonstrate upconversion spectra of Er3+ doped Y2O3 nanocrystals under different heat treating processes. After re-calcination, the intensity is enhanced by a factor of 18-56 at different Er3+ doping concentrations. This enhancement is attributed to the suppression of energy transfer from Er3+ to OHâ. The ln-ln pump power dependences of UC-PL intensity are separated by two regions with different slopes when Er3+ concentration exceeds to 0.5Â mol%. In addition, the slopes are substantially unchanged by re-calcination. These phenomena are discussed by the rate equations model which mainly considers the effects of cross relaxation processes of Er3+, nonradiative decay processes between the neighbor energy levels, and variation of the incident pump power.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 143, November 2013, Pages 423-431
Journal: Journal of Luminescence - Volume 143, November 2013, Pages 423-431
نویسندگان
Lu Liu, Haili Jiang, Yujin Chen, Xinlu Zhang, Zhenguo Zhang, Yuxiao Wang,