کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1612318 | 1516306 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and optical properties of single-phase ZnO1âxSx alloy films epitaxially grown by pulsed laser deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report on a detailed investigation of the structural and optical properties of single crystalline ZnO1âxSx thin films, placing emphasis on the elucidation of the correlation of the band gap and lattice parameters, particularly the lattice constant a, with the S content in the alloy films. High-quality ZnO1âxSx thin films with different S concentrations Xs (0 ⩽ Xs ⩽ 0.18) were grown epitaxially on c-plane sapphire substrates by pulsed laser deposition using a ZnS ceramic target with varying O2 partial pressures. X-ray diffraction studies revealed that all grown ZnO1âxSx thin films have a single-phase wurtzite structure. With increasing Xs value from 0 to 0.18, both lattice constants c and a expand monotonically from 5.204 to 5.366 Ã
and from 3.255 to 3.329Â Ã
, respectively, while the optical band gap shrinks from 3.27 to 2.92Â eV with a bowing parameter of 2.91Â eV. Based on these information, ZnOS/MgZnO heterostructures that have a perfect in-plane lattice match and a maximum barrier height can be proposed, which might eventually lead to new optoelectronic devices with superior performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 587, 25 February 2014, Pages 369-373
Journal: Journal of Alloys and Compounds - Volume 587, 25 February 2014, Pages 369-373
نویسندگان
Yunbin He, Lei Zhang, Liangheng Wang, Mingkai Li, Xunzhong Shang, Xiong Liu, Yinmei Lu, Bruno K. Meyer,