Quantitative Characterization of Optical Coupling in Nanoporous ZnO–WO 3 and ZnO–PEDOT Composite Electrodeposited Gratings Using Electrodiffraction Measurements
Quantitative Characterization of Optical Coupling in Nanoporous ZnO–WO 3 and ZnO–PEDOT Composite Electrodeposited Gratings Using Electrodiffraction Measurements
复制标题
使用电衍射测量对纳米多孔 ZnO–WO 3 和 ZnO–PEDOT 复合电沉积光栅中的光耦合进行定量表征
DOI：
10.1021/acs.jpcc.8b08072
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Corn, Robert M.
中科院分区：
文献类型：
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作者：
Fung, Han Wai;So, Seulgi;Kartub, Kellen;Corn, Robert M.
为了定量表征氧化锌(一种高折射率但非吸收材料)与电致变色材料(氧化钨或聚(3，4-乙二氧基噻吩基))之间的光学耦合，研究了一种新型的双组分复合纳米结构电沉积光栅的电衍射和电致变色特性。这两种材料通过光刻胶层依次电沉积到氟掺杂二氧化锡(FTO)涂层玻璃基板上，形成了一种可以通过电化学调制的光学衍射的光栅结构。电致变色光栅的扫描电子显微镜图像显示，电沉积的氧化锌形成了高比表面积的纳米结构薄膜。纳米结构的氧化锌是无吸收的，但其高折射率和大表面积将光重新定向到电致变色光栅中，使光栅的电衍射响应提高了4倍。
To quantitatively characterize the optical coupling between ZnO (a high refractive index but nonabsorptive material) and an electrochromic material (either tungsten oxide (WO3) or poly(3,4-ethylenedioxythiophene) (PEDOT)), electrodiffractive and electrochromic properties were investigated from a novel two-component composite nanostructured electrodeposited grating that incorporated both ZnO and either WO3or PEDOT. The sequential electrodeposition of these two materials through a photopatterned photoresist layer onto a fluorine-doped tin oxide (FTO)-coated glass substrate created a grating structure that exhibited optical diffraction that could be modulated electrochemically. SEM images of the electrochromic gratings revealed that the ZnO electrodeposition created a high surface area nanostructured thin film. The nanostructured ZnO is nonabsorbing, but its high refractive index and large surface area redirect light into the electrochromic grating and create a 4-fold enhancement in the grating’s electrodiffractive response.