AI Article Synopsis
- The study demonstrates a simple method to synthesize atomically thin Zn In S nanosheet arrays on FTO glass by hydrothermal means.
- By adjusting heat treatment, the researchers introduced oxygen doping and vacancies in the nanosheets, managing their phase, shape, and chemical properties.
- The performance of these nanosheets as photoanodes improved significantly, showing a 4.7 times increase in current density and better efficiency attributed to enhanced electron-hole pair separation and reduced resistance.
Article Abstract
The facile hydrothermal synthesis of Zn In S atomically thin nanosheet arrays on fluorine-doped tin oxide glass (FTO) substrates is presented. Through controlling heat treatment in air, O-doping and Zn, S vacancies were simultaneously introduced in Zn In S nanosheets with adjusted phase, morphology, chemical compositions, and energy level distribution. The surface defect states are passivated by depositing ultrathin Al O film by atomic layer deposition technology. The performance of Zn In S photoanodes is largely improved, with 4.7 times higher current density and reduced onset potential. The experimental results and density functional theory calculations indicate that the enhancement is attributed to the fast photoexcited electron-hole pair separation, decreased surface transfer impedance, prolonged carrier lifetime, and reduced overpotential of oxygen evolution reaction.
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| http://dx.doi.org/10.1002/anie.201811632 | DOI Listing |
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