کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1675700 1518103 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanocrystalline Sr2CeO4 thin films grown on silicon by laser ablation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Nanocrystalline Sr2CeO4 thin films grown on silicon by laser ablation
چکیده انگلیسی

Blue-white luminescent Sr2CeO4 thin films were deposited by using pulsed laser ablation (λ = 248 nm wavelength) on 500 °C silicon (111) substrates under an oxygen pressure of 55 mTorr. High-resolution electron transmission microscopy, electron diffraction and X-ray diffraction analysis revealed that the films were composed of nanocrystalline Sr2CeO4 grains of the order of 20–30 nm with a preferential orientation in the (130) crystallographic direction. The excitation and photoluminescence spectra measured on the films maintained the characteristic emission of bulk Sr2CeO4 however, the emission peak appeared narrower and blue-shifted as compared to the luminescence spectrum of the target. The blue-shift and a preferential crystallographic orientation during the growth formation of the film is related to the nanocrystalline nature of the grains due to the quantum confinement behavior and surface energy minimization in nanostructured systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 497, Issues 1–2, 21 February 2006, Pages 177–181
نویسندگان
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