Nb2O5thin films have been prepared using diethanolamine stabilized precursor sol andannealed at 500 oC. The optical, electrochemical, structural and morphologicalproperties of Nb2O5 thin film are described. The X-raydiffraction study shows the formation of hexagonal crystal structure in thefilm. The presence of Nb-O linkage has been confirmed from the FT-IR data. Thecoexistence of nanorod-like structures and round shaped polycrystalline grainshas contributed to an enhanced electrochemical activity in the film. The Li ionstorage capacity of the film is ~ 9.0 mC cm-2 at a sweep rate of 20 mV s-1 for a single layer coating. The optical modulation, colorationefficiency, and coloration/bleaching times of the film are 30.6% (at 550 nm),25 cm2 C-1 (at 550 nm) and 171 s/6 s, respectively. Theappreciably high coloration efficiency and fast switching kinetics shows thepotential utility of these films in electrochromic windows.
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机译：用二乙醇胺稳定的前体溶胶制备了Nb2O5薄膜，并在500 oC退火。描述了Nb2O5薄膜的光学，电化学，结构和形态特性。 X射线衍射研究表明在膜中形成了六方晶体结构。从FT-IR数据已经证实了Nb-O键的存在。纳米棒状结构和圆形多晶晶粒的共存有助于增强膜中的电化学活性。对于单层涂层，薄膜的Li离子存储容量在20 mV s-1的扫描速率下约为9.0 mC cm-2。膜的光学调制，着色效率和着色/漂白时间分别为30.6％（在550 nm），25 cm2 C-1（在550 nm）和171 s / 6 s。显着高的着色效率和快速的切换动力学表明了这些膜在电致变色窗中的潜在效用。
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