Optoelectronic properties of three dimensional WO₃ nanoshale and its application for UV sensing

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• 作者：Dali Shao ; Mingpeng Yu ; Jie Lian ; Shayla Sawyer
• 关键词：UV photodetector ; Tungsten oxide ; Responsivity ; Photoluminescence
• 刊名：Optical Materials
• 出版年：March, 2014
• 年：2014
• 卷：36
• 期：5
• 页码：1002-1005
• 全文大小：1442 K

文摘

A novel three dimensional (3D) WO₃ nanoshale structure was synthesized using a facile hydrothermal synthesis procedure. The structural and optoelectronic properties of the 3D WO₃ nanoshale were characterized by scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction, Raman spectroscopy, UV-Vis absorption and photoluminescence measurements. An UV photodetector fabricated from the 3D WO₃ nanoshale showed a good photoresponsivity (5.1 A/W), which is attributed to internal gain that introduced by surface oxygen adsorption-desorption process, as well as high surface to volume ratio of the 3D nanoshale structure. The results in this work may open up new possibilities of using WO₃ for optoelectronic applications including optical switches and photodetectors.