Facile synthesis of hybrid nanorods with the Sb2Se3/AgSbSe2 heterojunction structure for high performance photodetectors

Shuo Chen; Xvsheng Qiao; Fengxia Wang; Qun Luo; Xianghua Zhang; Xia Wan; Yang Xu; Xianping Fan

doi:10.1039/C5NR06384A

Facile synthesis of hybrid nanorods with the Sb₂Se₃/AgSbSe₂ heterojunction structure for high performance photodetectors†

Shuo Chen,^a Xvsheng Qiao,^a Fengxia Wang,^b Qun Luo,^b Xianghua Zhang,^c Xia Wan,^d Yang Xu^d and Xianping Fan*^a

* Corresponding authors

^a State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, P. R. China
E-mail: fanxp@zju.edu.cn

^b Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou, P. R. China

^c Laboratory of Glasses and Ceramics, Institute of Chemistry, CNRS-Université de Rennes I, campus de Beaulieu, 35042 Rennes cedex, France

^d College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, P. R. China

Abstract

An effective colloidal process involving the hot-injection method is developed to synthesize uniform single-crystalline Sb₂Se₃ nanorods in high yields. The photoconductive characteristics of the as-synthesized Sb₂Se₃ nanorods are investigated by developing a film-based photodetector and this device displays a remarkable response to visible light with an “ON/OFF” ratio as high as 50 (with an incident light density of 12.05 mW cm⁻²), short response/recovery times and long-term durability. To overcome the challenge of the intrinsic low electrical conductivity of Sb₂Se₃, hybrid nanorods with the Sb₂Se₃/AgSbSe₂ heterojunction structure having a type-II band alignment are firstly prepared. The electric current of the photodetector based on the Sb₂Se₃/AgSbSe₂ hybrid nanorod film has been significantly increased both in the dark and under light illumination. The responsivity of the photodetector based on the Sb₂Se₃/AgSbSe₂ hybrid nanorod film is about 4.2 times as much as that of the photodetector based on the Sb₂Se₃ nanorod film. This improvement can be considered as an important step to promote Sb₂Se₃ based semiconductors for applications in high performance photodetectors.

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Article information

DOI: https://doi.org/10.1039/C5NR06384A
Article type: Paper
Submitted: 16 Sep 2015
Accepted: 23 Dec 2015
First published: 23 Dec 2015

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Nanoscale, 2016,8, 2277-2283

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Facile synthesis of hybrid nanorods with the Sb₂Se₃/AgSbSe₂ heterojunction structure for high performance photodetectors

S. Chen, X. Qiao, F. Wang, Q. Luo, X. Zhang, X. Wan, Y. Xu and X. Fan, Nanoscale, 2016, 8, 2277 DOI: 10.1039/C5NR06384A

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