Enhanced electrochromic performance in PEDOT:PSS: the role of gold nanoparticle modulation

This research highlights the innovative integration of advanced nanomaterials to enhance the functionality and efficiency of next-generation electrochromic devices by integrating gold nanoparticles (AuNPs) into conductive polymers, poly(3,4-ethylene dioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS) films and employing a LiClO₄ electrolyte gel. Significant improvements in device performance were observed, including enhanced optical transmission, faster switching times, and increased stability. The devices, created by spin-coating the different molar ratio mixture of AuNP (0.1 M, 0.2 M, and 0.3 M) and PEDOT:PSS onto ITO substrates, demonstrated transmission variations from 54 to 75% at 640 nm and recovery times of approximately 48 s, outperforming pristine PEDOT:PSS systems. The incorporation of AuNPs enhances ionic mobility and facilitates faster redox reactions, resulting in improved color-switching dynamics and current flow stability. These findings emphasize the crucial role AuNPs play in improving device performance by enabling faster color switching and increased current flow. This research highlights the broader implications of using nanomaterials to promote energy efficiency and sustainability, offering promising solutions for advancing smart technology and modern infrastructure while reducing environmental impact.