Abstract
In this paper, we systematically designed vdW heterostructures by stacking the GaN and Janus-WSSe monolayer and chose the structure that has potential to be used as photocatalysts of water splitting for further investigation. By applying a biaxial strain, the electronic, optical and photocatalytic properties of this heterostructure were investigated to explore whether it is suitable for photocatalyst of water splitting. Results show the heterostructure show a type II band alignment under a − 2% strain, and the band gap is 2.26 eV which is fit to absorb solar light. The band edge of it straddles the water redox potentials at pH = 7. And the absorption coefficient in the visible and UV light region is large, especially for ultraviolet light. In a word, this GaN/Janus-WSSe vdW heterostructure under a − 2% biaxial external strain is a potential solar photocatalyst for water splitting at pH = 7.
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20 June 2023
An Erratum to this paper has been published: https://doi.org/10.1007/s40042-023-00828-4
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Jiankang, L., Cheng, L., Jie, L. et al. Design of GaN/Janus-WSSe vdW heterostructure for photocatalytic water splitting: ab initio calculations. J. Korean Phys. Soc. 82, 1180–1186 (2023). https://doi.org/10.1007/s40042-023-00782-1
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DOI: https://doi.org/10.1007/s40042-023-00782-1