Article,

Effect of micro-patterned fluorine-doped tin oxide films on electrochromic properties of Prussian blue films

, , , , , , and .
Applied Surface Science, (2014)
DOI: http://dx.doi.org/10.1016/j.apsusc.2014.06.092

Abstract

Abstract The effect of interface morphology on electrochromic characteristics was examined for an electrochromic device (ECD). Micro-patterned fluorine-doped tin oxide (FTO) films were fabricated using a photolithography process. Prussian blue (PB) films were then deposited on the patterned \FTO\ films. The surface areas of both \PB\ films and \FTO\ films were increased by patterning. \ECDs\ were assembled using patterned PB/FTO films as the electrochromic electrode, bare \FTO\ films as the counter electrode, and an electrolyte containing LiClO4 salt. The increased effective surface area of the patterned PB/FTO electrode boosted the mobility of ions at the interphase between the electrolyte and \PB\ electrode, and the electron transfer between \PB\ films and \FTO\ films. As a result, electrochromic properties such as transmittance and response time were significantly improved by employing the patterned \FTO\ films as the transparent conductive oxide layer of the electrochromic electrode.

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