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<p><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;">The photosensing properties of SnO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;">-coated TiO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> NWs have been fabricated by a two-step sequential deposition method; a thermal oxidation method followed by a hydrolysis method. Pure TiO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> NWs show vertically aligned and uniformly distributed NW arrays on Ti foil. It was observed that the SnO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> coating accumulated on the TiO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> NW surfaces with increasing Sn concentration. It filled the spaces between the NWs and finally covered the entire surface of the 100 mM SnO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> concentrated sample. The presence of increased Sn concentration on the surface was qualitatively determined by EDS and XPS measurements. The PL intensity decreases as the SnO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> coating increases, indicating recombination retardation. Coating thickness also decreases the band gap since electron excitation requires less energy. Since electrons are easily excited by the conduction band of TiO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;">, SnO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> coatings can form an energy level within the band gap. The highest photosensitivity was 142.05% with 100-mM SnO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;">-coated TiO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> NW arrays. An alternative approach to photosensitive UV devices can be made with 100-mM SnO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;">-coated TiO</span><span style="box-sizing: inherit; bottom: -0.25em; font-size: 13.5px; line-height: 0; position: relative; vertical-align: baseline; color: rgb(34, 34, 34); font-family: Merriweather, serif;">2</span><span style="color: rgb(34, 34, 34); font-family: Merriweather, serif; font-size: 18px;"> NW arrays due to their excellent light absorption properties and efficient charge carrier generation.</span></p> |
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