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In this paper, we present a method developed for soft electrochemical etching of fluorine-doped tin oxide-coated glass (FTO-coated glass) that consists of FTO treatment with alternating polarity current in a simple electrolyte. The developed method was found to alter morphology and hydrophilicity of FTO. In order to study the influence of soft electrochemical etching on FTO functionally as a substrate for electrochromic films, a Ni(OH)2-based electrochromic film was deposited onto treated FTO. It was discovered that films deposited onto etched substrate had significantly improved uniformity and higher coloration degree than films deposited on untreated FTO.

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