کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5404258 | 1392774 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal synthesis of Er-doped yttria nanorods with enhanced red emission via upconversion
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
(Y0.95Er0.05)2O3 single-crystalline nanorods with intense red emission via up-conversion are synthesized by a hydrothermal method under modest reaction conditions. Green and red emissions are observed for both as-synthesized sample and post-treated sample after excitation at 488 nm and with upconversion pumping (810 nm). The experimental results indicate that the stokes and up-conversion luminescence of the post-treated (500 °C for 2 h) Y2O3:Er nanorods is more efficient than those of as-prepared materials. The increase of the Stokes luminescence may result from the improved crystallization, smooth surface and uniform diameter distribution. The enhanced red emission via upconversion is due to removal of part of surface contaminants, such as CO32â and OHâ. It is believed that a new mechanism is responsible for populating the 4S3/2 and 4F9/2 levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 124, Issue 2, June 2007, Pages 351-356
Journal: Journal of Luminescence - Volume 124, Issue 2, June 2007, Pages 351-356
نویسندگان
Xia Li, Qiang Li, Jiyang Wang, Jing Li,