Effect of (3‐glycidyloxypropyl)trimethoxysilane (GOPS) on the electrical properties of PEDOT:PSS films |
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| Authors: | Anna Håkansson Shaobo Han Suhao Wang Jun Lu Slawomir Braun Mats Fahlman Magnus Berggren Xavier Crispin Simone Fabiano |
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| Affiliation: | 1. Laboratory of Organic Electronics, Department of Science and Technology, Link?ping University, Norrk?ping, Sweden;2. Department of Physics, Chemistry and Biology, Link?ping University, Link?ping, Sweden |
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| Abstract: | Poly(3,4‐ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS) has been reported as a successful functional material in a broad variety of applications. One of the most important advantages of PEDOT:PSS is its water‐solubility, which enables simple and environmental friendly manufacturing processes. Unfortunately, this also implies that pristine PEDOT:PSS films are unsuitable for applications in aqueous environments. To reach stability in polar solvents, (3‐glycidyloxypropyl)trimethoxysilane (GOPS) is typically used to cross‐link PEDOT:PSS. Although this strategy is widely used, its mechanism and effect on PEDOT:PSS performance have not been articulated yet. Here, we present a broad study that provides a better understanding of the effect of GOPS on the electrical and electronic properties of PEDOT:PSS. We show that the GOPS reacts with the sulfonic acid group of the excess PSS, causing a change in the PEDOT:PSS film morphology, while the oxidation level of PEDOT remains unaffected. This is at the origin of the observed conductivity changes. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017 , 55, 814–820 |
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| Keywords: | crosslinking film morphology GOPS oxidation level PEDOT:PSS |
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