Effect of substrate pre-treatment on microstructure and enhanced electrochromic properties of WO3 nanorod arrays
Effect of substrate pre-treatment on microstructure and enhanced electrochromic properties of WO3 nanorod arrays
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DOI：
10.1039/c5ra20970f
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发表时间：
2015-12
期刊：
影响因子：
3.9
通讯作者：
Wenkuan Man;Hui Lu;L. Ju;F. Zheng;Mei Zhang;Min Guo
中科院分区：
文献类型：
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作者：
Wenkuan Man;Hui Lu;L. Ju;F. Zheng;Mei Zhang;Min Guo
在预涂有一层 TiO2 种子的 FTO 基底上成功合成了 WO3 纳米棒阵列 (WNRAs)。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）和X射线光电子能谱（XPS）对形貌和微观结构进行了表征。详细研究了基材预处理对所制备的 WNRAs 电致变色 (EC) 性能的影响。与在WO3种子层上合成的WNRA相比，在最佳制备条件下，在TiO2种子层上生长的WNRA表现出较大的光学调制（77.5％，660 nm）和高着色效率（142.7 cm2 C−1）。此外，还讨论了TiO2种子层的退火温度对EC性能的影响。更重要的是，在测试过程中，在 TiO2 种子层上生长的 WNRAs 表现出良好的稳定性以及对 FTO 基板的强附着力。
WO3 nanorod arrays (WNRAs) were successfully synthesized on an FTO substrate pre-coated with a layer of TiO2 seeds. The morphology and micro-structure were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). The effect of substrate pre-treatment on electrochromic (EC) properties of as-prepared WNRAs was investigated in detail. Compared with those synthesized on WO3 seed layer, the WNRAs grown on TiO2 seed layer showed a large optical modulation (77.5%, at 660 nm) and high coloration efficiency (142.7 cm2 C−1) under the optimal preparation conditions. In addition, the influence of annealing temperature of the TiO2 seed layer on the EC performance was also discussed. More importantly, the WNRAs grown on the TiO2 seed layer presented good stability and strong adhesion to the FTO substrate during the test process.