A chloride-free solution based on ethylene glycol was shown to be suitable for the electrodeposition of copper onto zinc, allowing the fabrication of a Mo/Zn/Cu/Sn metallic precursor stack. The addition of diethanolamine (DEA) played an essential role in minimizing displacement reactions by shifting copper reduction towards a more negative potential. The electrochemical behavior of copper species with and without DEA was studied by cyclic voltammetry, and subsequently confirmed by displacement reaction assessment (OCV and ICP-OES measurements). The metallic stack was characterized by SEM and AFM, showing the effectiveness of the copper plating solution. Reactive annealing was carried out in a tubular furnace to obtain the CZTS kesterite semiconductor, as confirmed by XRD and Raman spectroscopy.
Panzeri, G., Dell'Oro, R., Trifiletti, V., Parravicini, J., Acciarri, M., Binetti, S., et al. (2019). Copper electrodeposition onto zinc for the synthesis of kesterite Cu2ZnSnS4 from a Mo/Zn/Cu/Sn precursor stack. ELECTROCHEMISTRY COMMUNICATIONS, 109 [10.1016/j.elecom.2019.106580].
Copper electrodeposition onto zinc for the synthesis of kesterite Cu2ZnSnS4 from a Mo/Zn/Cu/Sn precursor stack
Trifiletti, Vanira;Parravicini, Jacopo;Acciarri, Maurizio;Binetti, SimonaPenultimo
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2019
Abstract
A chloride-free solution based on ethylene glycol was shown to be suitable for the electrodeposition of copper onto zinc, allowing the fabrication of a Mo/Zn/Cu/Sn metallic precursor stack. The addition of diethanolamine (DEA) played an essential role in minimizing displacement reactions by shifting copper reduction towards a more negative potential. The electrochemical behavior of copper species with and without DEA was studied by cyclic voltammetry, and subsequently confirmed by displacement reaction assessment (OCV and ICP-OES measurements). The metallic stack was characterized by SEM and AFM, showing the effectiveness of the copper plating solution. Reactive annealing was carried out in a tubular furnace to obtain the CZTS kesterite semiconductor, as confirmed by XRD and Raman spectroscopy.
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