کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438153 | 1398181 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
White light generation from HfO2 films co-doped with Eu3++ Tb3+ ions synthesized by pulsed laser ablation technique
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work we investigate the luminescent properties of HfO2 films doped with Eu3+, Tb3+ and Eu3++ Tb3+ ions excited through photoluminescence and cathodoluminescence. These films were synthesized by the pulsed laser ablation technique and structurally studied by X-ray diffraction and Raman spectroscopy; the surface morphology was observed by scanning electron and atomic force microscopies. The optical transmittance was measured as well. The crystalline phase observed was the monoclinic of the HfO2. The surface morphology of the films exhibited a low roughness, as measured by atomic force microscopy. These films show a high transparency in the visible region. The emission spectra show bands centered at 598, 614 (strongest emission), and 631Â nm for the HfO2:Eu3+ films under excitation of 267Â nm. HfO2:Tb3+ films when excited at 277Â nm exhibit emission bands centered at 491, 543 (dominant emission), 551 and 586Â nm. In the case of co-doping with Eu3+ and Tb3+ ions white emission was observed under excitation with 320Â nm, as indicated by the CIE chromaticity diagram.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 1, Part A, January 2017, Pages 355-362
Journal: Ceramics International - Volume 43, Issue 1, Part A, January 2017, Pages 355-362
نویسندگان
A. Aguilar-Castillo, J.R. Aguilar-Hernández, M. GarcÃa-Hipólito, S. López-Romero, R.K. Swarnkar, A. Báez-RodrÃguez, R.J. Fragoso-Soriano, C. Falcony,