Large area, high resolution, dry printing of conducting polymers for organic electronics

Blanchet, Graciela B.; Loo, Yueh‐Lin; Rogers, John A.; Gao, Feng; Fincher, C. R.

doi:10.1063/1.1533110

Cited by 253 publications

(156 citation statements)

References 9 publications

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“…In step 3, protic solvents [ 1,[22][23][24][25] (mainly water) as well as acetonitrile [ 22 ] have been used as electrolytes for the electrosynthesis of PPy and PEDOT derivatives. For PPy, the use of an acetonitrile-based electrolyte was reported to yield more compact fi lms, with superior electron transfer characteristics and conductivities, presumably owing to the growing hydrophobicity of the chains during electropolymerization.…”

Section: Synthesis Of Gyroid-structured Conjugated Polymer Devicesmentioning

confidence: 99%

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3D Nanostructured Conjugated Polymers for Optical Applications

Dehmel

Nicolas

Scherer

et al. 2015

Adv Funct Materials

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wileyonlinelibrary.comThe ideal mesoporous morphology should also exhibit interconnected pores of constant diameter for an optimized accessibility to the interfacial surface.The double-gyroid (DG) morphology with cubic 3 Ia d symmetry fulfi ls these criteria. It is a 3D continuous equilibrium structure arising from the self-assembly of strongly segregated diblock copolymers, [ 12,13 ] which comprises two interwoven single-gyroid networks with I 4 1 32 symmetry. These networks are related by inversion and are separated by a so-called matrix phase. A signifi cant advantage of the DG structure is the self-supporting nature of all constituent phases, which facilitates the synthesis of free-standing networks and thus greatly increases the number of possible fabrication pathways. Moreover, the pores as well as the surrounding struts are uniformly sized and well-ordered, ensuring interconnectivity of both networks across macroscopic dimensions.The replication of 3D nanonetwork morphologies into functional materials separates the optimization of a self-assembled template (such as a DG morphology) from the synthesis of the functional material that fi lls the template. While well established for metals [ 14 ] and metal-oxides, [ 15 ] it is also promising for the nanostructured synthesis of intractable organic materials. The replication of self-assembled templates is particularly interesting for conjugated polymers, the synthesis of which does not allow a precise control over their 3D morphology. Compared to inorganic templates, which require corrosive media for their chemical degradation, [ 16 ] soft organic templates offer the possibility of a mild template removal by dissolution. Recently, Cho et al. have demonstrated the microemulsion synthesis of conducting poly(3,4-ethylenedioxythiophene) gels with a DG morphology. [ 17 ] Retrieving a mesoporous aerogel from this precursor for application in functional devices is however virtually impossible because the gel itself is unstable and undergoes a transition from the gyroidal to the lamellar phase at 30 °C. In contrast, replicating mesoporous, DG-structured polymer templates into conjugated polymers may afford denser and therefore more stable functional materials.Compared to the replication of inorganic materials, template-assisted polymer synthesis presents many challenges, as it requires a complex multistep wet-chemical process involving several orthogonal solvents that are highly specifi c to either the template or the synthesized replica. Furthermore, synthesis reactions have to be chosen so that the template remains inert. The following requirements are essential:First, to form the mesoporous polymeric template, one of the copolymer blocks must be removed without affecting the 3D Nanostructured Conjugated Polymers for Optical ApplicationsRaphael Dehmel , Alexandre Nicolas , Maik R. J. Scherer , and Ullrich Steiner * The self assembly of block-copolymers into the gyroid morphology is replicated into 3D nanostructured conjugated polymers. Voided styrenic gyroidal networ...

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Section: Synthesis Of Gyroid-structured Conjugated Polymer Devicesmentioning

confidence: 99%

“…Conductive polymers play an important role in several key technologies, such as printed electronics, [ 1 ] organic solar cells, [ 2 ] batteries, [ 3 ] and display technologies. [ 4 ] For many potential applications the intrinsic properties of these functional materials fail however to meet demanding technological requirements.…”

Section: Introductionmentioning

confidence: 99%

3D Nanostructured Conjugated Polymers for Optical Applications

Dehmel

Nicolas

Scherer

et al. 2015

Adv Funct Materials

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“…1 The electronic materials used in these cases have largely been polymers and small-molecule organic films because of the desire to exploit large-area, low-cost fabrication approaches, such as roll-to-roll dry 2 or inkjet printing. 3 The resulting electronic device performance, however, has been relatively poor, with inherent lowfield mobilities typically less than 1 cm 2 V -1 s -1 and mobilities in integrated devices typically below 0.05 cm 2 V -1 s -1 .…”

mentioning

confidence: 99%

Graphene Field-Effect Transistors with Gigahertz-Frequency Power Gain on Flexible Substrates

et al. 2012

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The development of flexible electronics operating at radio-frequencies (RF) requires materials that combine excellent electronic performance and the ability to withstand high levels of strain.In this work, we fabricate graphene field-effect transistors (GFETs) on flexible substrates from graphene grown by chemical vapor deposition (CVD). Our devices demonstrate unity-currentgain frequencies, f T , and unity-power-gain frequencies, f max , up to 10.7 and 3.7 GHz, respectively, with strain limits of 1.75%. These devices represent the only reported technology to achieve gigahertz-frequency power gain at strain levels above 0.5%. As such, they demonstrate the potential of CVD graphene to enable a broad range of flexible electronic technologies which require both high-flexibility and RF operation.

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“…Applications such as information displays, chemical sensors, humidity sensors, and electronic paper have been implemented. [1][2][3][4] Pentacene organic thin-film transistors ͑OTFTs͒ show carrier mobility of up to 3.2 cm 2 / V s and on/off current ratio exceeding 10 6 . 5 This is competitive to amorphous silicon transistors, which are used in liquid-crystal displays and flat-panel image detectors.…”

Section: Introductionmentioning

confidence: 99%

Mechanical force sensors using organic thin-film transistors

Darlinski

Böttger

Waser

et al. 2005

Journal of Applied Physics

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The pressure dependence of pentacene ͑C 22 H 14 ͒ transistors with solution-processed polyvinylphenol gate dielectric on glass substrates is investigated by applying uniaxial mechanical pressure with a needle. We found that organic thin-film transistors are sensitive to applied pressure inherently. The measurements reveal a reversible current dependence of the transfer characteristics where the drain current is switching between two states. Experimental and simulation results suggest that switch-on voltage and interface resistance are affected. The change takes seconds, hinting at trap states being responsible for the effect.

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Large area, high resolution, dry printing of conducting polymers for organic electronics

Cited by 253 publications

References 9 publications

3D Nanostructured Conjugated Polymers for Optical Applications

3D Nanostructured Conjugated Polymers for Optical Applications

Graphene Field-Effect Transistors with Gigahertz-Frequency Power Gain on Flexible Substrates

Mechanical force sensors using organic thin-film transistors

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