کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398111 | 1505877 | 2017 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and photoluminescent properties of a composite tantalum oxide and silicon nanocrystals embedded in a silicon oxide film
ترجمه فارسی عنوان
خواص ساختاری و فوتولومینسانس یک اکسید تانتالیم و نانوکریستیک سیلیکون که در یک فیلم اکسید سیلیکونی قرار گرفته اند
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کلمات کلیدی
کامپوزیت اکسید تانتالیم، نانوکریستالهای سیلیکون، اکسید سیلیکون،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Tantalum oxide crystals encrusted in a silicon oxide matrix were synthesized by using a hot filament chemical vapor deposition system (HFCVD). A solid source composed by a mixture in different percentages of Ta2O5 and silicon (Si) powders were used as reactants. The films were grown at 800 °C and 1000 °C under hydrogen ambient. The deposited films were characterized by X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM) and photoluminescence (PL) at room temperature. From the XPS results it was confirmed the formation of a mixture of Tantalum oxide, silicon oxide and Si nanoparticles (Ta2O5-SiO2-Si(nc)) as seen from the Si (2p) and Ta (4f) lines corresponding to Si+ and Ta+ states respectively. Ta2O5 and Si nanocrystals (Si-NCs) embedded in the silicon oxide films were observed on HRTEM images which corroborate the XPS results. Finally the emission properties of the films exhibited a broad band from 400 to 850 nm caused by the independent PL properties of tantalum oxide and Si-NCs that compose the film. The intensity of the emissions was observed to be dependent on both temperature of deposition and the ratio Ta2O5/Si, used as initial reactants. Results from this work might supply useful data for the development of future light emitter devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 184, April 2017, Pages 262-267
Journal: Journal of Luminescence - Volume 184, April 2017, Pages 262-267
نویسندگان
T. DÃaz-Becerril, V. Herrera, C. Morales, G. GarcÃa-Salgado, E. Rosendo, A. Coyopol, R. Galeazzi, R. Romano, F.G. Nieto-Caballero, J. Sarmiento,