Amorphous bismuth and GO co-doped WO3 electrochromic film with fast-switching time and long-term stability

Jin You Zheng; Qimeng Sun; Huijing Yang; Shuang Yu; Mengsi Li; Xiaomei Yu; Chengduo Wang; Tiantian Liu; Songjie Li

doi:10.1039/d3dt03805j

Amorphous bismuth and GO co-doped WO₃ electrochromic film with fast-switching time and long-term stability

Dalton Trans. 2024 Feb 6;53(6):2460-2464. doi: 10.1039/d3dt03805j.

Authors

Jin You Zheng^{1

2}, Qimeng Sun^{1

2}, Huijing Yang^{1

2}, Shuang Yu^{1

2}, Mengsi Li¹, Xiaomei Yu^{1

2}, Chengduo Wang³, Tiantian Liu^{1

2}, Songjie Li^{1

2}

Affiliations

¹ Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China. Songjie@zzu.edu.cn.
² National Key Laboratory of Coking Coal Green Process Research, Zhengzhou University, Zhengzhou 450001, China.
³ School of Material Science and Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China.

PMID: 38240594
DOI: 10.1039/d3dt03805j

Abstract

The sol-gel process for fabricating electrochromic thin films is straightforward, offering advantages such as low cost and ease of compositional control. Herein we prepared GO-Bi-WO₃ films with improved electrochromic performance using a simple sol-gel spin-coating method. The sample shows a fast-switching time (1.8 s for coloring and 1.8 s for bleaching), large optical modulation (85% at 630 nm), excellent stability (86.4% retention after 10 200 cycles), and high coloration efficiency (65.9 cm² C^-1). This work indicates the electrochromic performance of WO₃-based films can be enhanced by incorporating GO, which provides an effective strategy for the rapid, safe, and efficient fabrication of electrochromic thin films.