Sub-2V polymer electrochromic device using charge balaning counter electrode, NiOx
발표자
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초록
내용
Electrochromic device(ECD) are defined as material that can absorb light in the UV-Vis region depending on applied potential so that block the external light and change the window color. Existing ECD constantly consume electrical energy in order to absorb certain wavelength photovoltaic energy into the window. Therefore, a low-energy consumption ECD is essential for practical smart window usage. Our recent work uses Nickel oxide for counter electrode, a EC material that has complementary color change about the previously presented EC polymer ProDOT-Br for working electrode. Using the charge balance effect, we implement a low voltage operation(-1V to 1.8V) with excellent cyclability, color response time(＜0.6s) and large color contrast(ΔT＞70%). Furthermore, optical memory during the voltage-off state is important for energy saving and this work records＜10% during 2h and capacitive property(2Wh/kg) contributes to the study of low-power consumption ECD by obtaining discharging current