Effect of Co-doping on the electrochromic performance of hexagonal phase WO 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
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d4dt02319f

In this study, cobalt-doped hexagonal phase WO 3 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 3 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 3 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 3 . The resulting films with excellent electrochromic properties provide a convenient and effective means for ion-doped modification of WO 3 -based electrochromic films. This study presents a novel approach for preparing Co-doped hexagonal WO 3 nanorod thin films that exhibit excellent cycle stability, with Co doping effectively enhancing the optical modulation and coloring efficiency of WO 3 electrochromic materials.