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

PMID26515096

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

601497

Sigma-Aldrich

Lithium-⁷Li fluoride, 99 atom % ⁷Li, 99% (CP)

721956

Sigma-Aldrich

Methanol solution, NMR reference standard, 4% in methanol-d₄ (99.8 atom % D), NMR tube size 3 mm × 8 in.

I9516

Sigma-Aldrich

2-Propanol, BioReagent, for molecular biology, ≥99.5%

278475

Sigma-Aldrich

2-Propanol, anhydrous, 99.5%

675431

Sigma-Aldrich

2-Propanol, HPLC Plus, for HPLC, GC, and residue analysis, 99.9%, poly coated bottles

59304

Sigma-Aldrich

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

650188

Sigma-Aldrich

Methanol solution, (Methanol:Dimethyl sulfoxide 1:1 (v/v))

606723

Sigma-Aldrich

Methanol-¹²C, 99.95 atom % ¹²C

733458

Sigma-Aldrich

2-Propanol, electronic grade, 99.999% trace metals basis

24137

Sigma-Aldrich

2-Propanol, puriss., meets analytical specification of Ph. Eur., BP, USP, ≥99.5% (GC)

721964

Supelco

Methanol solution, NMR reference standard, 4% in methanol-d₄ (99.8 atom % D), NMR tube size 5 mm × 8 in.

I9030

Sigma-Aldrich

Isopropyl alcohol, meets USP testing specifications

190764

Sigma-Aldrich

2-Propanol, ACS reagent, ≥99.5%

109827

Sigma-Aldrich

2-Propanol, Laboratory Reagent, ≥99.5%

59300

Sigma-Aldrich

2-Propanol, puriss. p.a., ACS reagent, ≥99.8% (GC)

612510

Sigma-Aldrich

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

33539

Sigma-Aldrich

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

203645

Sigma-Aldrich

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

W292907

Sigma-Aldrich

Isopropyl alcohol, ≥99.7%, FCC, FG

D56802

Sigma-Aldrich

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

717975

Sigma-Aldrich

Methanol, NMR reference standard

237965

Sigma-Aldrich

Lithium fluoride, powder, -300 mesh

322415

Sigma-Aldrich

Methanol, anhydrous, 99.8%

240664

Sigma-Aldrich

1,2-Dichlorobenzene, anhydrous, 99%

179957

Sigma-Aldrich

Methanol, Laboratory Reagent, ≥99.6%

32213

Sigma-Aldrich

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

179337

Sigma-Aldrich

Methanol, ACS reagent, ≥99.8%

669431

Sigma-Aldrich

Lithium fluoride, Precipitated, 99.995%

449903

Sigma-Aldrich

Lithium fluoride, ≥99.99% trace metals basis

154903

Sigma-Aldrich

Methanol, ACS spectrophotometric grade, ≥99.9%