Low voltage colour modulation in hydrothermally grown Ni-Co nanoneedles for electrochromic application

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Devesh K. Pathak, Anjali Chaudhary, Manushree Tanwar, Suchita Kandpal, Tanushree Ghosh, Chanchal Rani, Rajesh Kumar
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引用次数: 5

Abstract

A nanostructured film of NiCo2O4 has been prepared using a hydrothermal technique by simply using separate precursors to obtain nanoneedle-like architecture for electrochromic applications. A homogeneous film consisting of packed nanoneedles with moderate density, appearing translucent white in colour, has been obtained and characterized using XRD and Raman spectroscopy techniques for confirming the composition and structure. Electrochemical analysis of the film reveals that the film shows good electrochromic properties under the anodic scan of potential with strong stability. The mechanism of the electrode under the transformation from natural white to opaque dark brown colour has been understood with the help of an in situ optical absorption spectroscopy technique. The electrode is found electrochromically active with a bias of up to 2 V and shows 50% optical contrast which makes it a good candidate for application in a solid state electrochromic device.

Abstract Image

电致变色用水热生长镍钴纳米针的低压颜色调制
利用水热技术制备了纳米结构的NiCo2O4薄膜,通过简单地使用单独的前驱体获得纳米针状结构,用于电致变色。采用XRD和拉曼光谱技术对其组成和结构进行了表征,得到了一种由密度适中的纳米针组成的均匀膜,呈现半透明白色。对膜的电化学分析表明,膜在阳极电位扫描下表现出良好的电致变色性能,稳定性强。利用原位吸收光谱技术,研究了电极由天然白色向不透明深棕色转变的机理。该电极具有高达2 V的偏置电致变色活性,并显示50%的光学对比度,这使其成为固态电致变色器件的良好候选材料。
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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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