【摘要】 以四水醋酸镍-无水乙醇-聚乙二醇(PEG6000)前驱液作为溶胶,采用旋涂法制备的电致变色用氧化镍薄膜,用XRD测得的氧化镍薄膜结晶性能不好,SEM观察到的表面形貌是均匀平整致密的;采用电化学腐蚀系统对其进行循环伏安特性的测试,随后又用紫外-可见光谱仪对变色性能进行测试;通过对比热处理时间、溶胶陈化时间、镀膜层数对薄膜变色性能的影响,总结出了四水醋酸镍-无水乙醇-聚乙二醇(PEG6000)体系溶胶-凝胶法制备氧化镍薄膜的工艺条件,即将溶胶陈化15d后旋涂镀膜3次,在250℃下热处理2h制备得到的薄膜在λ=391nm时透射率调节范围达到61%。更多还原

【Abstract】 The electrochromic(EC) behavior,the microstructure,and the morphology of nickel oxide thin films spin-coated on indium tin oxide /glass substrates by sol-gel method were investigated.The solutions were prepared by the systems of Ni(Ac)2·4H2O-anhydrous ethanol-PEG(6000).NiOx thin films was annealed at 250℃.The influence of the anneal,layers and the aging time of sols on the surface morphology,crystalline structure,and EC characteristics of the films were investigated by X-ray diffractometry(XRD),scanning electron microscopy(SEM),cyclic voltammetry(CV),and optical transmittance(OT).XRD spectrum revealed that films were not well-crystallized,and SEM images revealed that the surface morphology of the films were very uniform and dense.CV showed a reversible electrochemical insertion or extraction of the H+ ions,cycled in 1mol/L NaOH electrolyte.OT spectra revealed that,at the best condition,i.e.sols aged for 15 days,films spinned 3 times and annealed at 250℃ for 2h,the adjustment of the transmittance of films can be 61%(λ=391nm).更多还原