@article{discovery10119138, title = {Effects of Cationic Species in Salts on the Electrical Conductivity of Doped PEDOT:PSS Films}, number = {1}, volume = {3}, year = {2021}, journal = {ACS Applied Polymer Materials}, pages = {98--103}, month = {January}, note = {This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.}, keywords = {Salts, Plastics, Electrical conductivity, Conjugated polymers, Polymers}, abstract = {The electrical conductivity of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films with four salts that have various cations but the same bis(trifluoromethanesulfonyl)amide (TFSI) anion was studied. We found that doping salts of small-sized cations led to better conductivity because of the improved crystalline order and p-doped level of PEDOT, as revealed by the grazing-incidence wide-angle X-ray scattering (GIWAXS) and UV-vis spectrum. This phenomenon can be rationalized with the fact that small-sized cations with stronger Coulombic interactions can lead to high doping and rearrangement of PEDOT:PSS. These findings will help to develop recipes based on the PEDOT:PSS/salt composite toward the applications for printed flexible electronics.}, author = {Li, X and Liu, Z and Zhou, Z and Gao, H and Liang, G and Rauber, D and Kay, CWM and Zhang, P}, url = {https://doi.org/10.1021/acsapm.0c01084} }