Dynamically Switchable Multicolor Electrochromic Films
Dynamically Switchable Multicolor Electrochromic Films
复制标题
动态切换多色电致变色薄膜
DOI：
10.1002/smll.201804974
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发表时间：
2019-02-15
期刊：
影响因子：
13.3
通讯作者：
Yin, Yadong
中科院分区：
文献类型：
--
作者：
Li, Na;Wei, Pingping;Yin, Yadong
等离子体纳米结构的动态光开关在许多智能光学器件中有着广阔的应用前景。为了解决等离子体电致变色器件的可逆性和透过率对比度方面的挑战，本文报道了一种通过在Au/Ag合金的预定中空壳层上电响应溶解和沉积Ag来制备颜色可切换电致变色薄膜的策略。使用中空的Au/Ag合金纳米结构作为特定位置沉积银的稳定种子，能够消除随机自成核事件，并允许最佳的颜色切换可逆性。该中空结构还使得漂白状态和有色状态之间具有良好的透射率对比。这种新型电致变色薄膜具有制备方便、灵敏度高、光学性质可场可调等优点，被认为是设计新型智能光学器件的独特平台。
The dynamic optical switch of plasmonic nanostructures is highly desirable due to its promising applications in many smart optical devices. To address the challenges in the reversibility and transmittance contrast of the plasmonic electrochromic devices, here, a strategy is reported to fabricate color switchable electrochromic films through electro-responsive dissolution and deposition of Ag on predefined hollow shells of Au/Ag alloy. Using the hollow Au/Ag alloy nanostructures as stable seeds for site-specific deposition of Ag, elimination of the random self-nucleation events is enabled and optimal reversibility in color switching is allowed. The hollow structure further enables excellent transmittance contrast between the bleached and colored states. With its additional advantages such as the convenience for preparation, high sensitivity, and field-tunable optical property, it is believed that this new electrochromic film represents a unique platform for designing novel smart optical devices.