Solvent Annealing Influence of PEDOT on Its Electrochemical and Electrochromic Properties.

Kaiwen Lin, Yuying Jiang, Qinran Chen, Wangdaiqi Kong, Ruiyu Luo, Qianhui Zhou, Hao Liu

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Article in Nanomaterials (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Kaiwen LinDepartment of Materials and Food, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.ORCID 0000-0002-0314-0653

Yuying JiangDepartment of Materials and Food, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.

Qinran ChenDepartment of Materials and Food, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.

Wangdaiqi KongDepartment of Materials and Food, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.

Ruiyu LuoDepartment of Materials and Food, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.

Qianhui ZhouDepartment of Materials and Food, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.

Hao LiuHefei Institute for Public Safety Research, Tsinghua University, Hefei 230601, China.

Funding

Special Projects in Key Areas for the Universities of Guangdong Province (2024ZDZX1047)

6 · The paper itself

Abstract

The study of effect of solvent annealing on the optoelectronic properties of polymers is not new research hotspot, but the influence of solvent annealing on the electrochemical and electrochromic properties of PEDOT remains unexplored. This paper investigates the effects of three different solvents-chlorobenzene (CB), tetrahydrofuran (THF), and dimethylformamide (DMF)-on the self-assembly of PEDOT films and compares their thermal, morphological, electrochemical, and electrochromic properties. PEDOT annealed with DMF exhibits a highly crystalline film morphology, which increases the difficulty of ionic doping/undoping and leads to suboptimal electrochemical and electrochromic stability. After CB annealing, PEDOT forms a relatively gentle melting peak. In addition to a certain degree of crystallinity, the polymer film also exhibits cracking, which severely impairs the electrochromic performance. After THF annealing, PEDOT exhibits a gentler melting peak, a surface morphology that is more favorable for electrochemical and electrochromic performance, ultimately achieving an optical contrast of 28%, the fastest response time of 1.1 s, and the highest coloration efficiency of 184 cm

Indexed as

electrochemistryelectrochromicPEDOTsolvent annealing

Identifiers

PMID41222332

DOI10.3390/nano15211620

PMCPMC12610824

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