van der Waals integration of mixed-dimensional CeO2@Bi heterostructure for high-performance self-powered photodetector with fast response speed

Xinlin Liu; Cailing Liu; Yushuang Fu; Yiguo Xu; Karim Khan; Ayesha Khan Tareen; Ye Zhang

doi:10.1039/D2NR04428E

van der Waals integration of mixed-dimensional CeO₂@Bi heterostructure for high-performance self-powered photodetector with fast response speed†

Xinlin Liu,^a Cailing Liu,^a Yushuang Fu,^a Yiguo Xu,*^b Karim Khan,

^c Ayesha Khan Tareen

^c and Ye Zhang

*^a

Author affiliations

* Corresponding authors

^a School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
E-mail: yezhang@usc.edu.cn

^b Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
E-mail: yiguo.xu@outlook.com

^c School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, China

Abstract

Heterostructures have been extensively investigated for optoelectronic devices owing to their fantastic physicochemical properties. Herein, a mixed-dimensional van der Waals heterostructure (vdWH) CeO₂@Bi, 1D ceria (CeO₂) loaded with 0D bismuth quantum dots (Bi QDs), is synthesized through a facile hydrothermal bottom-up method. It is found that the fabricated CeO₂@Bi-based photoelectrochemical (PEC)-type photodetector (PD) shows self-powered photodetection capability with a fast photoresponse speed of 0.02 s. Besides, a photocurrent of 2.00 μA cm⁻² and a photoresponsivity of 888.89 μA W⁻¹ under 365 nm illumination are obtained. Furthermore, good long-term cycle stability is also observed after 1 month in a harsh environment, indicating the great potential for practical applications. These results are further supported by density functional theory (DFT) calculations. We believe that the presented work is expected to provide a new pathway for the future utilization of vdWHs for high-performance optoelectronics.

This article is part of the themed collection: Nanoscale 2023 Emerging Investigators

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Article information

DOI: https://doi.org/10.1039/D2NR04428E
Article type: Paper
Submitted: 12 Aug 2022
Accepted: 14 Oct 2022
First published: 15 Oct 2022

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Nanoscale, 2022,14, 16120-16129

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van der Waals integration of mixed-dimensional CeO₂@Bi heterostructure for high-performance self-powered photodetector with fast response speed

X. Liu, C. Liu, Y. Fu, Y. Xu, K. Khan, A. K. Tareen and Y. Zhang, Nanoscale, 2022, 14, 16120 DOI: 10.1039/D2NR04428E

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