【作者】 牛微； 毕孝国； 孙旭东；

【Author】 NIU Wei~(1,2),BI Xiao-guo~2,SUN Xu-dong~1 (1.Northeastern University Materials and Metallurgical Institute,Shenyang 110004,China; 2.Shenyang Institute of Engineering,Shenyang 110136,China)

【机构】 东北大学材料与冶金学院； 沈阳工程学院能源与动力工程系；

【摘要】 WO₃是性能优良的电致变色材料,在信息显示、灵巧窗（Smart window）、保密、军事伪装等领域具有广泛的应用前景。由于电致变色原因比较复杂,涉及材料的化学组成、薄膜的精细结构、能带结构、氧化还原特性等诸多方面,迄今对WO₃薄膜变色机理尚无统一的结论,限制了WO₃电致变色器件的设计制造、性能优化及应用。本文详细研究了WO₃薄膜的电致变色机理,阐述了导致其变色的电化学反应模型、色心模型、价间跃迁模型、极化子模型、能级模型和配位场模型,并分析了各个模型存在的局限。进一步研究并掌握WO₃薄膜电致变色机理,是其走向实用化的关键。更多还原

【Abstract】 WO₃ is excellent electrochromic materials,which can be used in the information display,smart window, secrecy and military camouflage fields.However there is no unified conclusion of WO₃ electrochromic mechanism because electrochromic process is so complicated,involving the chemical composition of materials, films structure,band structure,redox properties etc.Thereby WO₃ electrochromic device are limited on design, performance optimization and application.In this paper,main models about WO₃ electrochromic mechanism are discussed,namely,electrochemical reaction model,color center model,valence transition model,polaron model, energy level model and ligand field model.Limitations of each model are analyzed.Further studying and mastering WO₃ electrochromic mechanism is the key to put into practical application.更多还原