| 초록 |
Although poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) shows excellent electrical and mechanical properties, its electronic applications are still in challenge due to weak air stability. Herein, air-degradation mechanism of PEDOT:PSS-based films is investigated through in-situ X-ray/ultraviolet photoelectron spectroscopy. As increasing air-exposure time, insulating regions of the PEDOT:PSS-based films are enlarged by formation of S-Ox and C-Nx bonds, leading to deteriorated electrical conductivities and thermoelectrical properties. Additionally, methanol treatment to various PEDOT:PSS-based films can induce conformational changes between PEDOT and PSS molecules, effectively restoring the electrical and thermoelectric properties of the denatured PEDOT:PSS films. Collectively, we provides a useful strategy to improve air stabilities of PEDOT:PSS-based films by clarifying the degradation mechanism along with property recovery method. |
