Electrochromic Carbon Electrodes: Controllable Visible Color Changes in Metallic Single‐Wall Carbon Nanotubes
Electrochromic Carbon Electrodes: Controllable Visible Color Changes in Metallic Single‐Wall Carbon Nanotubes
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DOI：
10.1002/adma.201100549
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发表时间：
2011-07
影响因子：
29.4
通讯作者：
K. Yanagi;R. Moriya;Yohei Yomogida;T. Takenobu;Y. Naitoh;T. Ishida;H. Kataura;K. Matsuda;Y. Maniwa
中科院分区：
文献类型：
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作者：
K. Yanagi;R. Moriya;Yohei Yomogida;T. Takenobu;Y. Naitoh;T. Ishida;H. Kataura;K. Matsuda;Y. Maniwa
电致变色是材料在电化学氧化还原过程中光学性质发生可逆变化的现象。[ 1 ]典型的电致变色装置依赖于透明电极，例如氧化铟锡（ITO）玻璃，以向电致变色材料施加电势。然而，由于出现了对稀有金属资源的竞争性需求，期望开发不使用ITO的系统。在这里，我们证明了电致变色器件可以使用金属单壁碳纳米管（SWCNT）。颜色变化可以由没有ITO层的金属SWCNT产生。金属SWCNT充当电致变色组件和电极两者，指示通向所有碳纳米管电致变色装置的路线。我们展示了非常清晰，稳定和可逆的颜色变化的金属单壁碳纳米管的直径为0.84，1.0和1.4 nm，分别呈现黄色，洋红色和蓝绿色。其显色效率为（1.9 ± 0.2）× 102 cm 2C-1
Electrochromism is the phenomenon of reversible changes in the optical properties of a material during electrochemical redox processes. [ 1 ] Typical electrochromic devices rely on transparent electrodes such as indium tin oxide (ITO) glasses to apply a potential to electrochromic materials. However, it is desirable to develop a system without using ITO due to emerging competing demands on rare metal resources. Here, we demonstrate that electrochromic devices can be made using metallic singlewall carbon nanotubes (SWCNTs). The color changes can be produced by metallic SWCNTs without ITO layers. The metallic SWCNTs act as both electrochromic components and electrodes, indicating a route to all carbon nanotube electrochromic devices. We demonstrate very clear, stable and reversible color changes in metallic SWCNTs with diameters of 0.84, 1.0, and 1.4 nm, exhibiting yellow, magenta, and blue-green colors, respectively. The color changes are reversible and repetitive, and a relatively good coloration effi ciency (1.9 ± 0.2) × 10 2 cm 2 C − 1