Improved Alignment of PEDOT:PSS Induced by in-situ Crystallization of "Green" Dimethylsulfone Molecules to Enhance the Polymer Thermoelectric Performance.
Front Chem
; 7: 783, 2019.
Article
em En
| MEDLINE
| ID: mdl-31803719
ABSTRACT
Dimethylsulfone (DMSO2), a small organic molecule, was observed to induce the alignment of poly(3,4-ethylenedioxythiophene) poly(4-styrenesulfonate) (PEDOTPSS) via in-situ crystallization in PEDOTPSS 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 PEDOTPSS film, which was fabricated from pre-mixed solution of PEDOTPSS and DMSO2, up to 1080 S/cm, and more importantly, such a PEDOTPSS 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 PEDOTPSS. Pairwise interaction energies and free energy of solvation between PEDOTPSS and DMSO2 were calculated by first-principles and molecular mechanics, respectively, revealing the mechanism of DMSO2 in enhancing the electrical conductivity.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Front Chem
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Singapura