Photomemory Devices Research Articles

ボリピロール被覆半導体マイクロアレイ電極を用いた光機能デバイス

We fabricated an electrochemical photo memory device using a Pt-TiO2-Pt microarray electrode coated with a polypyrrole film. The TiO2 microband electrode, positioned between two comb-shaped Pt electrodes, was an n-type semiconductor to oxidize the polypyrrole film under light irradiation. Because oxidation enhances the conductivity of polypyrrole, light irradiation is detected by the increase in the conductivity of polypyrrole between the two Pt comb electrodes. Enhanced conductivity remained even after light irradiation was terminated. This photo memory behavior was observed when the potential of the titanium oxide electrode was set to -0.3V vs. SCE.