溶胶凝胶制备工艺对电致变色用氧化镍薄膜性能的影响  

The effect of prepared technology by sol-gel method on the property of nickel oxide thin films for electrochromic application

作　　者：刘芳[1] 周敏[1] 钟一叶[1] 宋宇[1] 李金荣[1] 杨伟峰[1] 冯博学[1] 

机构地区：[1]兰州大学磁学与磁性材料教育部重点实验室,甘肃兰州730000

出　　处：《功能材料》2008年第11期1835-1838,1842,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(60576013;60536010);国家基础科学人才培养基金资助项目(J0630313)

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%。The eleetroehromie （EC） behavior, the mierostrueture, 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, erystalline 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-erystallized, 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 lmol/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）.

关 键 词：电致变色 溶胶-凝胶 氧化镍薄膜 

分 类 号：O484[理学—固体物理]