稳定WO_3乳液的制备及其电变色性能的研究  

Characterization of electrochromic WO_3 films prepared by stabilized WO_3 suspension

作　　者：魏小兰[1] 沈培康[1] 

机构地区：[1]中山大学光电材料与技术国家重点实验室物理科学与工程技术学院,广东广州510275

出　　处：《功能材料》2004年第6期752-754,共3页Journal of Functional Materials

基　　金：广州市科技重点资助项目(2003Z2 D0081);国家"十.五"863资助项目(2003AA517050)

摘　　要：　在两亲高分子化合物的存在下,于水溶液中合成了稳定的WO3颗粒悬浮乳液,颗粒分布在100～230nm范围内。乳液放置数月不会发生沉降。SEM表征结果表明,由此乳液形成的薄膜的表面呈多孔颗粒状。电变色性能测试表明薄膜的变色具有良好的可逆性。在扫描速度为100mV/s时,薄膜第一次循环的还原电量QR为10.8mC·cm-2,氧化电量QO为10.3mC·cm-2,电量损失率仅为5%,着色效率(CE)为69.8cm2/C。现场计时电流实验表明,薄膜具有很快的电变色速度。The stable WO3 colloidal in aqueous solution has been synthesized at the presence of amphiphilic polymer. No precipitation is found after several months' storage. The SEM images show that the film was composed by particles with unordered pores. The electrochromic measurements show that the WO3 films prepared by WO3 were reversible and fast both for coloration and bleaching. The charge required (QR) during the coloration of the film was 10.8 mC&middotcm-2 in 0.5 mol/L H2SO4 and Q0 was 10.3 mC&middotcm-2 in the reverse process. The loss of the amount of charge is less than 5%. The coloration efficiency was 69.8 cm2/C.

关 键 词：WO3 两亲高分子 电致变色 

分 类 号：O484[理学—固体物理]