KyungBeom Kim  GaHyun Kim  MinHyuck Seo  JongMin Kim

Vol. 31,  No. 2, pp. 89-99, Jun.  2025
10.7464/ksct.2025.31.2.89

Electrochemical chromism Polypyrrole Conducting polymer Electro chromic material

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This paper introduces a new technique for the analysis of the electro-chemical lighting of conducting polypyrrole (Ppy) films using a self-devised quartz crystal and Si-Photodiode combination method. The quartz crystal used in this study had mirror finished Au electrodes. The electrodes did not have light transmission properties so the light intensity could be measured only using reflection mode. The reflection mode light measurement was advantageous for obtaining total light amount measurements because these measurements cannot be obtained from transmission mode light measurements using a normal semi-conductor ITO electrode. After polymerizing the Ppy thin film on the quartz crystal, the changes in electrical properties, the mass changes of the thin film due to the movement of anions, and the changes in viscoelasticity and light intensity accompanying the electrochemical reaction were detected simultaneously through cyclic voltammetry. Furthermore, all the measured variables related to the electrochemical oxidation-reduction reaction were analyzed. Based on the results, it was suggested that this technique is useful for electrochromic analysis with normal metal electrodes using reflection mode. In particular, these results imply possible future developments for chemical, biochemical, and electrochemical sensors.