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Vertically aligned ZnO/In2S3 core/shell heterostructures with enhanced photoelectrochemical properties

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Abstract

ZnO/In2S3 core/shell heterostructures were successfully synthesized through a successive ion layer absorption and reaction (SILAR) method. The thickness of In2S3 shells were adjusted from 6.8 to 36.1 nm by adopting different SILAR cycles. Compared with pure ZnO NRs, the ZnO/In2S3 core/shell NRs presented better light absorption, higher photocurrent density and enhanced incident photon-to-current conversion efficiency (IPCE). Both the highest photocurrent density and IPCE of obtained ZnO/In2S3 core/shell heterostructures were almost three times higher than that of pristine ZnO NRs. The PL spectra, i–t curves, EIS plots, Mott–Schottky plots and ECSA curves were also recorded to investigate the influence of the In2S3 deposition on the photoelectrochemical (PEC) performance of ZnO NRs. The In2S3 nanoparticles deposited on the surface of ZnO NRs enhanced the light absorption of the heterostructures and facilitated the separation of photogenerated electron–hole pairs, eventually resulting in the enhanced PEC performance. The preparation of ZnO/In2S3 core/shell heterostructures by the simple SILAR method would increase the possibility for its practical application of photoelectrodes in the future.

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Acknowledgements

We gratefully thank the financial supports from the National Natural Science Foundation of China (No. 51888103, 51925602), the China National Key Research and Development Plan Project (No. 2018YFB1502000).

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  1. International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, 28 West Xianning Road, Xi’an, 710049, China

    Xiaobing Li, Jinzhan Su & Liejin Guo

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Li, X., Su, J. & Guo, L. Vertically aligned ZnO/In2S3 core/shell heterostructures with enhanced photoelectrochemical properties. J Mater Sci: Mater Electron 31, 15773–15784 (2020). https://doi.org/10.1007/s10854-020-04139-3

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