Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 109, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2019.106580
Keywords
Organic solution; Ethylene glycol; Diethanolamine; Chloride-free; CZTS
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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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