CHIEN-FANG DINGLan Y.-T.Young H.-T.Hsiao W.-T.2022-06-302022-06-30202103796779https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102076258&doi=10.1016%2fj.synthmet.2021.116743&partnerID=40&md5=e060568a35785934f98a02e6729511b8https://scholars.lib.ntu.edu.tw/handle/123456789/614696In this study, a thermal treatment method for poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT: PSS) films on glass substrate was treated by a pulsed CO2 laser in the atmospheric environment. The two main parameters of the PEDOT: PSS films in thermal treatment are laser fluence and scan speed. The electrical, optical, and surface properties were measured by an in-line four-point probe instrument, spectrophotometry, atomic force microscope (AFM), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). After treatment, the conductivity was enhanced from 2.83E-02 S/cm to 59.4 S/cm in 181 s due to removing the residual water in the film. Furthermore, the transmittance value was decreased from 89.1% to 88.5%, and the surface roughness increased from 2.27 to 2.49 nm. The conductivity increased due to the reunion between PEDOT: PSS molecules and increased in the surface PEDOT/PSS ratio. However, when the laser power exceeded the durability of the PEDOT: PSS, a significant decrease in conductivity and transmittance was observed. Compared with the hotplate thermal treatment in the atmospheric environment, CO2 pulsed laser thermal treatment has advantages for PEDOT: PSS thermal treatment in a small region. © 2021 Elsevier B.V.Atomic force microscopy; Carbon dioxide; Carbon dioxide lasers; Conducting polymers; Electric conductivity; Pulsed laser deposition; Pulsed lasers; Scanning electron microscopy; Styrene; Substrates; Surface roughness; X ray photoelectron spectroscopy; Atmospheric environment; Conductivity; Enhanced conductivity; Ethylenedioxythiophenes; Poly(3,4-ethylenedioxythiophene): poly(styrene sulphonate) film; Polystyrenesulfonate; Pulsed CO2 laser; Pulsed CO2 lasers; Thermal; Treatment methods; Heat treatment[SDGs]SDG6[SDGs]SDG7journal article10.1016/j.synthmet.2021.1167432-s2.0-85102076258