Thermodynamic Design of Electrolyte for CuO/Cu 2 O Bilayer by Anodic Electrodeposition

  • Miura R
  • Kitada A
  • Fukami K
  • et al.
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Abstract

Electrodeposition of multilayered semiconductors requires a bath design to electrodeposit the upper layer(s) without dissolving the base layer(s) below. We present herein a reliable approach to bath design based on thermodynamics from the viewpoint of complexation with ligands. A CuO/Cu 2 O bilayer film was targeted as an example. We searched a thermodynamic database of complexation constants for ligands that could form a complex with Cu(II) but not with Cu(I), and identified monoethanolamine as one of the best candidates. Using a Cu(II)-monoethanolamine alkaline aqueous bath, we experimentally confirmed that a CuO upper layer could be deposited without dissolving the Cu 2 O base layer. We believe that this design is applicable to other bilayer films produced by electrochemical techniques.

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Miura, R., Kitada, A., Fukami, K., & Murase, K. (2021). Thermodynamic Design of Electrolyte for CuO/Cu 2 O Bilayer by Anodic Electrodeposition. Journal of The Electrochemical Society, 168(6), 062506. https://doi.org/10.1149/1945-7111/ac064c

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