کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8044412 1518919 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultraviolet detector with ultrahigh responsivity based on Anatase TiO2 nanotubes array modified with (001) exposed nanofacets
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Ultraviolet detector with ultrahigh responsivity based on Anatase TiO2 nanotubes array modified with (001) exposed nanofacets
چکیده انگلیسی
In this paper, partial density of states and band structures of Anatase's (001) and (101) facets were studied by first-principles calculation. Based on partial density of states, electrons in the (001) facet of Anatase have much higher transition probability to be excited from valence band maximum to conduction band minimum compared with those in an (101) facet, which shows a stronger electronic activity of (001) facet. Besides, the (001) and (101) facets of Anatase have a direct and indirect band structure, respectively, based on the first-principle calculation results. The direct band structure of the (001) facet makes it more suitable to be used in optical detection. Anatase TiO2 nanotubes array modified with (001) exposed nanofacets were grown on Ti substrates by anodization, hydrothermal, and then post annealing. An ultrahigh responsivity as high as 1575.97μA/mW·cm2 under 365 nm ultraviolet light wavelength and 5 V bias was achieved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 151, May 2018, Pages 237-242
نویسندگان
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