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- W1981505566 abstract "The electrolyte electroreflectance technique has been applied to the determination of the flat-band potential (${V}_{mathrm{FB}}$) of the n-type ${mathrm{WSe}}_{2}$ van der Waals surface, both smooth and stepped, in the presence of different electrolytes (${mathrm{I}}^{mathrm{ensuremath{-}}}$, ${mathrm{I}}^{mathrm{ensuremath{-}}}$-${mathrm{I}}_{2}$, and ${mathrm{Cl}}^{mathrm{ensuremath{-}}}$). Direct experimental evidence that ${mathrm{I}}_{3}^{mathrm{ensuremath{-}}}$ ions are specifically adsorbed from the ${mathrm{I}}^{mathrm{ensuremath{-}}}$-${mathrm{I}}_{2}$ solution is shown and implications for the high stability of the electrode are discussed. In the stabilizing electrolyte (${mathrm{I}}^{mathrm{ensuremath{-}}}$-${mathrm{I}}_{2}$) the smooth surface does not show any photocurrent transient behavior at positive potentials of ${V}_{mathrm{FB}}$. The specific adsorption of ${mathrm{I}}_{3}^{mathrm{ensuremath{-}}}$ species favors hole transfer to the electrolyte, restraining surface recombination. By contrast, in a nonstabilizing electrolyte (${mathrm{Cl}}^{mathrm{ensuremath{-}}}$), an important decay of the photocurrent with time is observed. This is attributed to recombination at surface steps generated during photocorrosion and to the unpinning of the bands due to the formation of a porous insulating ${mathrm{WO}}_{3}$ deposit on the electrode surface. The observed dependence of the photocurrent-time decay on the electrolyte pH is consistent with this assumption. A comprehensive model for surface photoreactions is proposed on the basis of recent calculations of the ${mathrm{WSe}}_{2}$ electronic structure." @default.
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- W1981505566 date "1988-11-15" @default.
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- W1981505566 title "Photoreactions at the<i>n</i>-type-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>WSe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>–electrolyte interface: Study by electrolyte electroreflectance and photocurrent transient measurements" @default.
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- W1981505566 doi "https://doi.org/10.1103/physrevb.38.9881" @default.
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