Effect of Co-doping on the electrochromic performance of hexagonal phase WO 3 nanorods

• Published in: Dalton transactions : an international journal of inorganic chemistry 2024-10, Vol.53 (42), p.17221-17232
• Main Authors: Qu, Zhaozhu, Li, Ankang, Gao, Ming, Sun, Xiaohui, Zhang, Xuyang, Wu, Guohua, Wang, Xiangwei
• Format: Article
• Language: English
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/D4DT02319F

In this study, cobalt-doped hexagonal phase WO nanorods were prepared by a template-free hydrothermal method. The effects of varying the cobalt doping concentration on the microscopic morphology and electrochromic properties of hexagonal phase WO films were investigated. Films synthesized with the optimal cobalt element doping concentration demonstrate a notable improvement in their electrochromic properties compared to the pure hexagonal phase WO films. The film doped with 1.5% Co exhibited excellent cycling stability, retaining 98.55% of its original value after 500 cycles. The introduction of cobalt results in the formation of a nanorod structure with a high specific surface area within the film. This structure provides additional reaction sites for the electrochromic reaction process, thereby enhancing the optical modulation and coloration efficiency of WO . The resulting films with excellent electrochromic properties provide a convenient and effective means for ion-doped modification of WO -based electrochromic films.