کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7991994 | 1516145 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evidence of a strong electron-hole separation effect in ZnO@TiO2 core/shell nanowires
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Evidence of a strong electron-hole separation effect in ZnO@TiO2 core/shell nanowires Evidence of a strong electron-hole separation effect in ZnO@TiO2 core/shell nanowires](/preview/png/7991994.png)
چکیده انگلیسی
In this work, a strong electron-hole separation effect in ZnO@TiO2 core/shell nanowire arrays was investigated. On the surface of well-aligned ZnO nanowires, a high-quality TiO2 shell was grown in a range of thicknesses through the deposition of TiO2 nanoparticles on ZnO nanowire arrays by pulsed laser deposition (PLD). In the photoluminescence (PL) spectra of the ZnO@TiO2 core/shell nanowires, a strong and broad visible emission band from 450 to 650â¯nm appears, which is related to surface defects; meanwhile, the ultraviolet (UV) emission due to exciton recombination simultaneously disappears. These changes in the PL spectra originate from a highly efficient electron-hole separation effect. This work presents evidence of this strong electron-hole separation effect in these ZnO@TiO2 core/shell nanowire arrays, which makes them promising candidates for use in optoelectronic devices for dye-sensitized solar cells and ultraviolet photodetectors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 749, 15 June 2018, Pages 217-220
Journal: Journal of Alloys and Compounds - Volume 749, 15 June 2018, Pages 217-220
نویسندگان
Liqing Liu, Huiling Ou, Kunquan Hong, Lixia Wang,