کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10633452 | 993031 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and optical properties of sol-gel derived Er3+-doped Al2O3-Ta2O5 films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Preparation and optical properties of sol-gel derived Er3+-doped Al2O3-Ta2O5 films Preparation and optical properties of sol-gel derived Er3+-doped Al2O3-Ta2O5 films](/preview/png/10633452.png)
چکیده انگلیسی
Thin films of the system xAl2O3-(100 â x)Ta2O5-1Er2O3 were prepared by a sol-gel method and a dip-coating technique. The influences of the composition and the crystallization of the films on Er3+ optical properties were investigated. Results of X-ray diffraction indicated that the crystallization temperature of Ta2O5 increased from 800 to 1000 °C with increased values of x. In crystallized films, the intensities of the visible fluorescence and upconversion fluorescence tend to decrease with an increase in x values, due to the high phonon energy of Al2O3; the strongest fluorescence is observed in a crystallized film for x = 4 heat treated at 1000 °C. In amorphous films obtained by heat treatment at relatively low temperatures the Er3+ fluorescence could not be observed because strong fluorescence from organic residues remaining in the films thoroughly covered the Er3+ fluorescence. On the other hand, the Er3+ upconversion fluorescence in the amorphous films was observed to be stronger than that in the crystallized films. The strongest upconversion fluorescence is observed in an amorphous film for x = 75 heat treated at 800 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 27, Issue 12, December 2005, Pages 1851-1858
Journal: Optical Materials - Volume 27, Issue 12, December 2005, Pages 1851-1858
نویسندگان
Nobuko Maeda, Noriyuki Wada, Hiroaki Onoda, Akira Maegawa, Kazuo Kojima,