| 초록 |
Conductive polymers, which have high optical transparency, excellent thermal stability, and enhanced form-factor, have been spot-lighted for a various electronic device. Among many conductive polymers having a conjugated structure, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is the most commercially available due to its high electrical conductivity. However the degradation of PEDOT:PSS electrode in an aqueous solution introduces the serious drawback for high reliability. In this work, we studied the degradation mechanism of highly conductive PEDOT:PSS thin layer in water bath. PEDOT:PSS electrode lost the initial conductivity after dipping below 1 second, but the decreasing rate was dramatically reduced as increasing dipping time. Depending on the pH condition and dipping time, the change of the electrical conductivity, the amount of remaining PSS, the oxidation state of PEDOT, and the chain structure inside film were analyzed to confirm the step of degradation. |
