A study of the influence of polyvinyl pyrrolidone concentration in the deposition electrolyte on the properties of electrochromic Ni(OH)2 films

摘要: Electrochromic devices are actuation elements of smart windows and allow saving the energy needed to cool premises. Electrochemical deposition can significantly reduce cost electrochromic deposition. This paper discusses an electrochemical method based on nickel hydroxide from electrolyte containing nitrate polyvinylpyrralidone (PVP). The films were obtained in a galvanostatic mode at different PVP concentrations. As result studies, it has been shown that presence affects properties resulting films. Moreover, strongly depend used concentration. Thus, low concentrations, addition causes improvement characteristics, including stability While high concentrations PVP, characteristics deteriorate up their almost complete disappearance. proposes possible mechanism explains solutions with consists improving wettability substrate, increasing contact area deposit substrate and, as consequence, adhesion decrease resistance conductive oxide – Ni(OH) 2 film boundary. Also, work found range optimal for 0.1 М Ni(NO 3 ) , which is 0.5–2 %