Enhancing photoresponsivity of self-powered UV photodetectors based on electrochemically reduced TiO2 nanorods

Pengli Yan; Yihui Wu; Guiji Liu; Ailong Li; Hongxian Han; Zhaochi Feng; Jingying Shi; Yang Gan; Can Li

doi:10.1039/C5RA18307C

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Enhancing photoresponsivity of self-powered UV photodetectors based on electrochemically reduced TiO₂ nanorods†

Pengli Yan,^ab Yihui Wu,^ac Guiji Liu,^ac Ailong Li,^ac Hongxian Han,*^a Zhaochi Feng,^a Jingying Shi,^a Yang Gan*^b and Can Li*^a

Author affiliations

* Corresponding authors

^a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, China
E-mail: canli@dicp.ac.cn, hxhan@dicp.ac.cn
Tel: +86 411 84379070

^b School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin, China
E-mail: ygan@hit.edu.cn
Tel: +86 451 86413708

^c University of Chinese Academy of Sciences, Beijing, China

Abstract

Electrochemically reduced TiO₂ nanorod arrays (R-NRAs) have been used for the first time to construct a self-powered, visible light blind ultraviolet (UV) photodetector. The fabricated R-NRAs device demonstrated superior photodetector performance with high photon-to-current efficiency of up to 22.5% at an applied bias of 0 V. The enhancement is attributed to a disordered surface layer which greatly improves the charge separation and transfer efficiency at the electrode/electrolyte interface.

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Article information

DOI: https://doi.org/10.1039/C5RA18307C
Article type: Communication
Submitted: 08 Sep 2015
Accepted: 20 Oct 2015
First published: 20 Oct 2015

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RSC Adv., 2015,5, 95939-95942

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Enhancing photoresponsivity of self-powered UV photodetectors based on electrochemically reduced TiO₂ nanorods

P. Yan, Y. Wu, G. Liu, A. Li, H. Han, Z. Feng, J. Shi, Y. Gan and C. Li, RSC Adv., 2015, 5, 95939 DOI: 10.1039/C5RA18307C

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