کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7909221 | 1510788 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of site substitutions and concentration on the structural, optical and visible photoluminescence properties of Er doped BaTiO3 thin films prepared by RF magnetron sputtering
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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: Effects of site substitutions and concentration on the structural, optical and visible photoluminescence properties of Er doped BaTiO3 thin films prepared by RF magnetron sputtering Effects of site substitutions and concentration on the structural, optical and visible photoluminescence properties of Er doped BaTiO3 thin films prepared by RF magnetron sputtering](/preview/png/7909221.png)
چکیده انگلیسی
The structural, optical and visible photoluminescence of the Erbium (Er) doped BaTiO3 (BT:Er) thin films were studied in terms of Er3+ substitutions for Ba and Ti sites with different Er3+ doping concentrations (0, 1, 3 and 5Â wt%). X-ray diffraction pattern of BT:Er films with different Er3+ concentration showed tetragonal phase with preferred orientation along (1Â 0Â 1) plane. The lattice constant of BT:Er film of 1Â wt% Er3+ shrank and then expanded for higher concentration. This indicates that Er3+ ions are completely incorporated into the host lattice by substituting for Ba2+ sites for 1Â wt% Er3+ and then Ti4+ sites for higher Er3+ concentration in the BaTiO3 host. The crystallite size decreased for 1Â wt% and then increased for higher Er (3 and 5Â wt%) concentrations. The Scanning electron microscopy images revealed well patterned arrangement of larger spherical grains with neck formation. X-ray photoelectron spectroscopy analysis confirmed the presence of barium, titanium, erbium and oxygen in BT:Er films. An average transmittance >80% in visible region were observed for all the films. Optical band gap energy of BT:Er films were found to vary with increase in Er3+ concentration. The high refractive index >2 of these films can be used in optical application and anti-reflection coatings. Photoluminescence spectra of the films exhibited an increase in the emission intensity up to 3Â wt% of Er3+ and then a decrease, due to self quenching. The improved optical properties of BT:Er films makes suitable for optical applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 46, August 2015, Pages 304-309
Journal: Optical Materials - Volume 46, August 2015, Pages 304-309
نویسندگان
L.V. Maneeshya, P.V. Thomas, K. Joy,