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Ultrahigh electrical conductivity in solution-sheared polymeric transparent films.

Ultrahigh electrical conductivity in solution-sheared polymeric transparent films.

Proceedings of the National Academy of Sciences of the United States of America (2015-10-31)

Brian J Worfolk, Sean C Andrews, Steve Park, Julia Reinspach, Nan Liu, Michael F Toney, Stefan C B Mannsfeld, Zhenan Bao

ABSTRACT

With consumer electronics transitioning toward flexible products, there is a growing need for high-performance, mechanically robust, and inexpensive transparent conductors (TCs) for optoelectronic device integration. Herein, we report the scalable fabrication of highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) ( PSS) thin films via solution shearing. Specific control over deposition conditions allows for tunable phase separation and preferential PEDOT backbone alignment, resulting in record-high electrical conductivities of 4,600 ± 100 S/cm while maintaining high optical transparency. High-performance solution-sheared TC PEDOT:PSS films were used as patterned electrodes in capacitive touch sensors and organic photovoltaics to demonstrate practical viability in optoelectronic applications.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Methanol, SAJ special grade

Sigma-Aldrich

Methanol, HPLC Plus, ≥99.9%, poly-coated bottles

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Methanol, suitable for HPLC, gradient grade, 99.93%

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Methanol, anhydrous, 99.8%

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Lithium fluoride, powder, <100 μm, ≥99.98% trace metals basis

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1,2-Dichlorobenzene, anhydrous, 99%

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Lithium fluoride, ≥99.99% trace metals basis

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Lithium fluoride, powder, -300 mesh

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Lithium fluoride, Precipitated, 99.995%

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Methanol, suitable for HPLC

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Methanol, SAJ first grade, ≥99.5%

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Methanol, JIS special grade, ≥99.8%

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Methanol, BioReagent, ≥99.93%

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Methanol, NMR reference standard

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Isopropyl alcohol, ≥99.7%, FCC, FG

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Methanol, JIS 300, ≥99.8%, for residue analysis

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Methanol, ACS reagent, ≥99.8%

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Methanol, Absolute - Acetone free

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Methanol, ACS spectrophotometric grade, ≥99.9%

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Methanol, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.8% (GC)

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Methanol, puriss., meets analytical specification of Ph Eur, ≥99.7% (GC)

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1,2-Dichlorobenzene, ReagentPlus^®, 99%

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Methanol, ACS reagent, ≥99.8%

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Methanol, Laboratory Reagent, ≥99.6%

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Methanol, ACS reagent, ≥99.8%

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2-Propanol, ACS reagent, ≥99.5%

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2-Propanol, anhydrous, 99.5%

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2-Propanol, 99.5%, HPLC grade

Sigma-Aldrich

2-Propanol, BioUltra, for molecular biology, ≥99.5% (GC)

Sigma-Aldrich

1,2-Dichlorobenzene solution, NMR reference standard, 5% in acetone-d₆ (99.9 atom % D), NMR tube size 5 mm × 8 in.