Fabrication of double-walled carbon nanotube film/TiO2 nanotube array heterojunctions with length-dependent photoresponse for broad band photodetectors
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第3期
论文作者：Ming-jie Yang Wei Liu Jia-lin Sun Jin-quan Wei Jia-lin Zhu
文章页码：307 - 312
摘 要：A novel photodetector based on double-walled carbon nanotube （DWCNT） film/TiO2 nanotube array （TNA） heterojunctions was fabricated, which exhibited high photoresponse in a broad spectral range. The photoresponse of the detector was dramatically dependent on the length of the TNAs. High photocurrent-to-dark current ratio with a value of 3360 was observed in the visible range by optimizing the lengths of the TNAs. The photosensitive regions could be extended into the near-infrared range. These results reveal that DWCNT film/TNA heterojunctions show potential applications for broad band photodetectors.
Ming-jie Yang1,2，Wei Liu1，Jia-lin Sun2，Jin-quan Wei3，Jia-lin Zhu2
1. Laboratory of Advanced Materials, Department of Material Science and Engineering, Tsinghua University2. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University3. Key Laboratory for Advanced Materials Processing Technology of Education Ministry, Department of Mechanical Engineering, Tsinghua University
摘 要：A novel photodetector based on double-walled carbon nanotube （DWCNT） film/TiO2 nanotube array （TNA） heterojunctions was fabricated, which exhibited high photoresponse in a broad spectral range. The photoresponse of the detector was dramatically dependent on the length of the TNAs. High photocurrent-to-dark current ratio with a value of 3360 was observed in the visible range by optimizing the lengths of the TNAs. The photosensitive regions could be extended into the near-infrared range. These results reveal that DWCNT film/TNA heterojunctions show potential applications for broad band photodetectors.
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