کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400091 | 1505918 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and microstructural properties of erbium doped alumina-yttria oxide thin films deposited by aerosol MOCVD
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Erbium-doped aluminum-yttrium oxide films (Er: Al2O3-Y2O3) were prepared by aerosol-UV assisted Metalorganic Chemical Vapor Deposition (MOCVD) at 410 °C and annealed at 1000 °C. The effects of humidity of carrier gas and UV-assistance on their structure and optical properties were investigated using scanning electron microscope, X-ray diffraction and Transmission electron microscopy. It was found that under low air humidity and without UV-assistance the films present a low mol% Al2O3 (10 mol%) two different structural phases are observed corresponding to the cubic and the monoclinic structures of Y2O3. When the deposition takes place under high air humidity and with UV assistance the Er:Al2O3-Y2O3 films present a very high mol% Al2O3 (88 mol%) and crystallize in the Y3Al5O12 (YAG) compound mixed with an amorphous phase. The Er3+ luminescence analyzed in the visible and IR regions, shows the classical green transitions. The best optical properties were obtained with the Er:Al2O3-Y2O3 films grown under high air humidity with UV-assistance. Under such deposition conditions, 4I13/2 lifetimes was found to be 1.1 ms. This indicates that the deposition conditions, in particular air humidity, play an important role in the luminescent properties even after annealing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 142, October 2013, Pages 52-56
Journal: Journal of Luminescence - Volume 142, October 2013, Pages 52-56
نویسندگان
Rached Salhi, Carmen Jimenez, Jean.-Luc Deschanvres, Yannick Guyot, Odette Chaix-Pluchery, Laetitia Rapenne, Ramzi Maâlej, Mohieddine Fourati,