PEDOT與PEDOT/ZnO薄膜研製、導電特性、形態與酸鹼緩衝性質之研究

Abstract

This study was divided into three parts. First, PEDOT conductive film was prepared by the method of “In situ oxidative polymerization.” PTAA or PVP was introduced to discuss the effects on conductivity and transmittance. Second, various concentrations of ZnO seeds were adopted to synthesize ZnO on the PEDOT or PEDOT-PTAA film, and the influence on morphology and crystalline were also conducted. Third, PEDOT or PEDOT-PTAA film and PEDOT/ZnO or PEDOT-PTAA/ZnO composite film were used as pH buffering materials to undergo the pH tuning test. In the first part, PEDOT conductive film was prepared by the method of “In situ oxidative polymerization.” The different coating times and amounts of PTAA or PVP mixing with were investigated to compare the conductivity and transmittance. We found that PEDOT mixing with PVP in two-times spin-coating process could reach the best conductivity (~100 S/cm) and transmittance (>85 %). In the second part, ZnO with different concentrations were synthesized on the PEDOT and PEDOT/PTAA film by “Hydrothermal growth method.” The result showed that the growth of ZnO rod on PEDOT-PTAA film would achieve the highest aspect ratio. In addition, 0.01 M ZnO solution was the best recipe to attain thin and dense ZnO nanowire. In the final part, PEDOT and PEDOT-PTAA film could adjust pH tuning test only weak base to neutral (pH=9 to pH=7). However, ZnO composite film had the ability to tune both weak base and weak acid to neutral. Consequently, the PEDOT/ZnO and PEDOT-PTAA/ZnO composite film were working on pH tuning test.