文献类型：期刊文献

英文题名：Efficient electrochromic efficiency and stability of amorphous/crystalline tungsten oxide film

作者：Li, Zixu[1];Liu, Zhifeng[1,2];Zhao, Lei[3];Chen, Ying[1];Li, Junwei[1,2];Yan, Weiguo[2]

第一作者：Li, Zixu

通讯作者：Liu, ZF[1]

机构：[1]Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China;[2]Tianjin Key Lab Bldg Green Funct Mat, Tianjin 300384, Peoples R China;[3]Xinxiang Univ, Sch Civil Engn & Achitecture, Xinxiang 453003, Peoples R China

第一机构：Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

通讯机构：[1]corresponding author), Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China.

年份：2023

卷号：930

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20224112863449);Scopus(收录号：2-s2.0-85139428299);WOS:【SCI-EXPANDED(收录号:WOS:000879071300001)】；

基金：Acknowledgment The authors gratefully acknowledge financial support from National Natural Science Foundation of China (No. 52272009) .

语种：英文

外文关键词：WO3; Amorphous; Crystalline; Electrochromic; Film

摘要：Electrochromic material is a reversible color change material under applied electric field and the adjustable spectrum range is significantly wide. As an inorganic electrochromic material, WO3 has the characteristics of high color contrast and easy synthesis. Despite said characteristics, the poor stability and low electro-chromic efficiency of single WO3 films limit the application. In the present study, compositing amorphous WO3 (a-WO3) on crystalline WO3 (c-WO3) is proposed, so as to form composite film and improve the electrochromic properties. The synergistic mechanism of crystalline and amorphous WO3 was analyzed and the synergistic effect on improving the electrochromic properties of film was investigated. Li+ diffusion of the amorphous/crystalline WO3 (a-WO3/c-WO3) film (13.3956 x 10-12 cm2/s) was more than three times that of the c-WO3 film (4.3681 x 10-12 cm2/s). At the same time, the coloring time, bleaching time of the a-WO3/c-WO3 film were 30%, 37% shorter, respectively, than the c-WO3 film, and the electrochromic efficiency of the a-WO3/c-WO3 film was 40% higher than the c-WO3 film. The detailed experimental data reveal that the film had high electrochromic properties due to the crystalline WO3 enhancing the cyclic stability and the amorphous WO3 enhancing the ion storage and transport capabilities. The strategy of controlling the crystallinity to form a composite film enhanced the electrochromic properties, and is a promising method for electrochromic study in the future. (c) 2022 Elsevier B.V. All rights reserved.