Electrochromic behavior of NiO thin films deposited by e-beam evaporation at room temperature

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• 作者：S贸nia Pereira ; Alex ; ra Gon莽alves ; Nuno Correia ; Joana Pinto ; Lu铆s Pereira ; Rodrigo Martins ; Elvira Fortunato
• 关键词：Nickel oxide ; Electrochromic devices ; Thermal evaporation ; Chromogenic materials
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：January, 2014
• 年：2014
• 卷：120
• 期：part_PA
• 页码：109-115
• 全文大小：7630 K

文摘

In this work we report the role of thickness on electrochromic behavior of nickel oxide (NiO) films deposited by e-beam evaporation at room temperature on ITO-coated glass. The structure and morphology of films with thicknesses between 100 and 500 nm were analyzed and then correlated with electrochemical response and transmittance modulation when immersed in 0.5 M LiClO₄-PC electrolyte. The NiO exhibits an anodic coloration, reaching for the thickest film a transmittance modulation of 66% between colored and bleached state, at 630 nm, with a color efficiency of 55 cm² C^鈭?. Very fast switch between states was obtained, where coloration and bleaching times are 3.6 s cm^鈭? and 1.4 s cm^鈭?, respectively.