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Hybrid UV photodetector with high photo-to-dark current ratio based on ordered TiO2 nanorod arrays and polystyrene sulfate

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Abstract

Vertically aligned TiO2 nanorods arrays were successfully synthesized on FTO glass by wet-chemical method. Based on polystyrene sulfate (PSS) functionalized TiO2 nanorods arrays, a sandwich-structured hybrid UV photodetector was fabricated. The photo-to-dark current ratio of the device increases by more than 3 orders of magnitude with typical case, while the dark current is about 10 nA at 1 V bias. The high photoresponse together with the low dark current could probably contribute a large photocurrent and low-power application. The high performance of the hybrid material and facile low-cost fabrication of the UV detector make the devices promising for large-area UV photodetection applications.

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Authors and Affiliations

  1. State Key Laboratory of Fine Chemicals, The R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian, 116024, China

    WenJi Zheng, GaoHong He, XiangCun Li & XiaoMing Yan

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  1. WenJi Zheng
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  2. GaoHong He
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  3. XiangCun Li
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  4. XiaoMing Yan
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Correspondence to GaoHong He.

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Zheng, W., He, G., Li, X. et al. Hybrid UV photodetector with high photo-to-dark current ratio based on ordered TiO2 nanorod arrays and polystyrene sulfate. Sci. China Technol. Sci. 56, 2642–2645 (2013). https://doi.org/10.1007/s11431-013-5354-7

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  • DOI: https://doi.org/10.1007/s11431-013-5354-7

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