Research Information System
Materials Science and Engineering: B, vol.323, 2026 (SCI-Expanded)
The aim of this study was to determine the spectroelectrochemical properties and electrochemical stability of 3-layer polypyrrole containing films. Within the scope of the study, polypyrrole (PPy) was produced on ITO-coated PET via electrochemical synthesis, and a three-layer composite material was developed with 1-(2-aminophenyl) pyrrole (AP). In the first layer, PPy was synthesized on ITO-coated PET in the potential range of −1.0 and + 1.0 V at a scan rate of 100 mV/s in 1 M NaClO4/ACN supporting electrolyte solution. For the second layer, PPy-AP was produced from AP on the PPy film via electrochemical reaction. In the third layer, PPy was synthesized on this film (PPy-AP) by the same method, resulting in a PPy-AP-PPy film. Optical electronic transitions of these polymer films were determined by using UV–Vis spectroscopy. TEM analysis was performed for investigation their surface morphological properties. According to TEM analysis, PPy-AP and PPy-AP-PPy contained the spherical structures, with diameters of the spherical structures being higher in the PPy-AP-PPy. The primary objective in producing these polymer films was to investigate their spectroelectrochemical behaviors and electrochemical stabilities. According to the reached experimental studies, it was observed that the absorbance value increased depending on the applied potential range. This demonstrated that the 3-layered films were successfully synthesized via electrochemical polymerization on the ITO-coated PET surface. According to their current-time cyclic voltammograms, the coloring times of the PPy and PPy-AP-PPy films were found as 3 s. The absorbance change values (∆A) for the PPy, PPy-AP and PPy-AP-PPy films were calculated as 0.0812, 0.0021 and 0.0023, respectively. As a result, the produced films could be used as components in electronic devices with their absorbance changes depending on the potential, their response times to this change, and their electrochemical stability against potential/current depending on time.