Please use this identifier to cite or link to this item: https://doi.org/10.3389/fchem.2019.00783
Title: Improved Alignment of PEDOT:PSS Induced by in-situ Crystallization of “Green” Dimethylsulfone Molecules to Enhance the Polymer Thermoelectric Performance
Authors: Zhu, Q.
Yildirim, E.
Wang, X.
Soo, X.Y.D.
Zheng, Y.
Tan, T.L.
Wu, G.
Yang, S.-W.
Xu, J. 
Keywords: crystallization
dimethylsulfone
PEDOT:PSS
polymer alignment
thermoelectric
Issue Date: 2019
Publisher: Frontiers Media S.A.
Citation: Zhu, Q., Yildirim, E., Wang, X., Soo, X.Y.D., Zheng, Y., Tan, T.L., Wu, G., Yang, S.-W., Xu, J. (2019). Improved Alignment of PEDOT:PSS Induced by in-situ Crystallization of “Green” Dimethylsulfone Molecules to Enhance the Polymer Thermoelectric Performance. Frontiers in Chemistry 7 : 783. ScholarBank@NUS Repository. https://doi.org/10.3389/fchem.2019.00783
Rights: Attribution 4.0 International
Abstract: Dimethylsulfone (DMSO2), a small organic molecule, was observed to induce the alignment of poly(3,4-ethylenedioxythiophene): poly(4-styrenesulfonate) (PEDOT:PSS) via in-situ crystallization in PEDOT:PSS mixture, which was verified by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and atomic force microscopy (AFM). A chemically stable dopant, DMSO2, remarkably raised the electrical conductivity of the PEDOT:PSS film, which was fabricated from pre-mixed solution of PEDOT:PSS and DMSO2, up to 1080 S/cm, and more importantly, such a PEDOT:PSS film showed a long-term humidity stability and it retained near 90% electric conductivity after 60 days, suggesting DMSO2 is promising for an eco-friendly alternative to replace dimethyl sulfoxide (DMSO), ethylene glycol (EG) and various acids dopants that have been widely employed to dope and post-treat PEDOT:PSS. Pairwise interaction energies and free energy of solvation between PEDOT:PSS and DMSO2 were calculated by first-principles and molecular mechanics, respectively, revealing the mechanism of DMSO2 in enhancing the electrical conductivity. © Copyright © 2019 Zhu, Yildirim, Wang, Soo, Zheng, Tan, Wu, Yang and Xu.
Source Title: Frontiers in Chemistry
URI: https://scholarbank.nus.edu.sg/handle/10635/209532
ISSN: 2296-2646
DOI: 10.3389/fchem.2019.00783
Rights: Attribution 4.0 International
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