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- Title
Improved thermoelectric performance of PEDOT:PSS films prepared by polar-solvent vapor annealing method.
- Authors
Jiang, Qinglin; Liu, Congcong; Song, Haijun; Shi, Hui; Yao, Yuanyuan; Xu, Jingkun; Zhang, Ge; Lu, Baoyang
- Abstract
To improve thermoelectric performance, polar-solvent vapor annealing (PSVA) method was introduced into the preparation of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films. The solvent vapors included dimethyl sulfoxide, ethylene glycol, N,N-dimethylformamide, N-methyl-2-pyrrolidone, and deionized water (HO). The PSVA-treated PEDOT:PSS films exhibited significantly enhanced electrical conductivity and the maximum value was up to 496 S cm. Especially, utilizing the PSVA method, HO could also remarkably enhance the electrical conductivity of pristine PEDOT:PSS film from 0.2 to 57 S cm. There was no distinct change for the Seebeck coefficient of PSVA-treated films with the significantly enhanced electrical conductivity, thereby a maximum power factor of 9.47 μW m K at room temperature was obtained. The effects of PSVA method on thermoelectric performance of PEDOT:PSS films were also investigated systematically by analyzing the changes in morphology, carrier mobility and carrier concentration. The results confirmed that PSVA-treated PEDOT:PSS films could obtain smoother morphologies and realize the simultaneous increase of carrier mobility and carrier concentration, which results in the improvement of the thermoelectric performance.
- Subjects
THERMOELECTRICITY; SOLVENTS; THIN films; ANNEALING of crystals; THIOPHENES; ELECTRIC conductivity; TEMPERATURE effect
- Publication
Journal of Materials Science: Materials in Electronics, 2013, Vol 24, Issue 11, p4240
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-013-1391-z