کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7886843 1509788 2018 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photoluminescence properties of SiC/SiO2 heterojunctions obtained by TiO2-assisted chemical vapor deposition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Photoluminescence properties of SiC/SiO2 heterojunctions obtained by TiO2-assisted chemical vapor deposition
چکیده انگلیسی
SiC/SiO2 heterojunctions have been synthesized at 1400 °C by chemical vapor deposition, using Si and phenolic resin powder as starting materials and TiO2 nanoparticles as catalyst. The morphology of the SiC/SiO2 heterojunctions consists of chain-bead shaped and core-shell chains, and the heterojunctions are up to several hundred microns in length, with diameters of 0.3-1 µm in the chains and 2-8 µm in the beads. A vapor-solid tip-growth mechanism for the formation of the heterojunctions is proposed. Photoluminescence spectra of SiC/SiO2 heterojunctions exhibit a significant blue-shift, which indicates that these materials are ideal for application in new optoelectronic devices. The TiO2 nanoparticles play a key role in promoting the formation and growth of the heterojunction nanochains as well as in enhancing their luminescence properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 10, July 2018, Pages 11204-11210
نویسندگان
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