Ultrasonic Spray Coated Polyamide Electrochromic Film
Ultrasonic Spray Coated Polyamide Electrochromic Film. We have demonstrated the ultrasonic spray coated polyamide electrochromic film, which can be used to study the variation of electrochromic layer through changing the ink solution concentrations and deposition temperatures. The ink formulation can be directly related to film thickness, whereas the heating temperature during coating process has a strong impact on the roughness of deposited film. The strong couples between the kinetic studies with these two processing parameters demonstrate that the dry deposited TPA-OMe polyamide film at higher deposition temperature reveals a faster electrochromic response, lower charge requirements and less conspicuous color changes during the oxidation process as compared to the wet deposited film at lower deposition temperature. On the other hand, manipulation in solution concentrations almost shows reverse trend in electrochromic behavior as compared to deposition temperature. All these four films with different coating conditions sustain duty cycles of neutralization/oxidation switching without color fatigue. The scalable ultrasonic spraying process developed here is easily amenable for large area and patterned film, and is well applied for ECD changing its transmittance from transparent to turquoise with good electrochromic performance.
Ultrasonic Spray Coating Video
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