کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1670830 1008905 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cathodoluminescence property of ZnO nano-phosphors fabricated by pulsed Nd:YAG laser ablation in plasma circumstance
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Cathodoluminescence property of ZnO nano-phosphors fabricated by pulsed Nd:YAG laser ablation in plasma circumstance
چکیده انگلیسی

Cathodoluminescence (CL) with energy-controlled electron beams was used to study the inner structure of ZnO nano-phosphors fabricated by YAG laser ablation under oxygen gas and oxygen plasma circumstances. Varying accelerating voltages of electron beams from 1.0 to 3.0 kV, it was clearly seen that the CL spectrum in the case of ZnO nano-phosphors fabricated under the oxygen gas background changed from a broad one centered at approximately 500 nm to a narrow one peaked at 380∼400 nm. This result indicates that there is an oxygen vacancy-rich shell in the surface area and a fine crystalline ZnO structure in the inner core region. Under the oxygen plasma circumstance at 500 Pa, however, we found that there is a crystalline structure in the surface layer of ZnO nano-phosphors due to the sufficient supply of oxygen ions and atoms and suppression of the formation of oxygen vacancy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 518, Issue 13, 30 April 2010, Pages 3517–3521
نویسندگان
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