Ultrahigh Mobility in an Organic Semiconductor by Vertical Chain Alignment

Skrypnychuk, Vasyl; Wetzelaer, Gert‐Jan A. H.; Gordiichuk, Pavlo; Mannsfeld, Stefan C. B.; Herrmann, Andreas; Toney, Michael F.; Barbero, David R.

doi:10.1002/adma.201503422

Cited by 69 publications

(67 citation statements)

References 56 publications

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“…In general, improvements to overall device performance would be anticipated through similar optimization strategies that involve the use of high molar mass P3HT4860, higher boiling point solvents61 or thin-film annealing procedures4851. Furthermore, as it has been demonstrated that the alignment of carbon nanotubes62 and semiconductive polymer chains substantially enhances charge-carrier mobility2763, alignment of the BCP fibres should also lead to increased mobilities.…”

Section: Resultsmentioning

confidence: 99%

Uniform electroactive fibre-like micelle nanowires for organic electronics

et al. 2017

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Micelles formed by the self-assembly of block copolymers in selective solvents have attracted widespread attention and have uses in a wide variety of fields, whereas applications based on their electronic properties are virtually unexplored. Herein we describe studies of solution-processable, low-dispersity, electroactive fibre-like micelles of controlled length from π-conjugated diblock copolymers containing a crystalline regioregular poly(3-hexylthiophene) core and a solubilizing, amorphous regiosymmetric poly(3-hexylthiophene) or polystyrene corona. Tunnelling atomic force microscopy measurements demonstrate that the individual fibres exhibit appreciable conductivity. The fibres were subsequently incorporated as the active layer in field-effect transistors. The resulting charge carrier mobility strongly depends on both the degree of polymerization of the core-forming block and the fibre length, and is independent of corona composition. The use of uniform, colloidally stable electroactive fibre-like micelles based on common π-conjugated block copolymers highlights their significant potential to provide fundamental insight into charge carrier processes in devices, and to enable future electronic applications.

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Section: Resultsmentioning

confidence: 99%

Uniform electroactive fibre-like micelle nanowires for organic electronics

et al. 2017

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“…Face‐on orientations of P3HT in thin films can be induced by the proper choice of solvent, mechanical strain, and surface rubbing of the films . There are still limited examples of the end‐on orientation of polymer chains in films . The molecular orientation can strongly affect the photophysical processes in PHJs in many ways, as discussed in Sections and .…”

Section: Preparation and Characterization Of Planar Heterojunctionsmentioning

confidence: 99%

Organic Planar Heterojunctions: From Models for Interfaces in Bulk Heterojunctions to High‐Performance Solar Cells

2016

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Recent progress regarding planar heterojunctions (PHJs) is reviewed, with respect to the fundamental understanding of the photophysical processes at the donor/acceptor interfaces in organic photovoltaic devices (OPVs). The current state of OPV research is summarized and the advantages of PHJs as models for exploring the relationship between organic interfaces and device characteristics described. The preparation methods and the characterization of PHJ structures to provide key points for the appropriate handling of PHJs. Next, we describe the effects of the donor/acceptor interface on each photoelectric conversion process are reviewed by examining various PHJ systems to clarify what is currently known and not known. Finally, it is discussed how we the knowledge obtained by studies of PHJs can be used to overcome the current limits of OPV efficiency.

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“…Furthermore, another lesson from the fast OPBT devices is that the development of new materials with an improved vertical mobility is needed. There are basically two approaches: The processing conditions such as the evaporation rate, the substrate temperature, or the use of a a seed layer can be utilized to influence the growth of the semiconductor layer . The other approach is to chemically synthesize new materials that form crystals that have higher charge carrier mobility in vertical direction .…”

Section: Outlook: Summary and Need For New Materialsmentioning

confidence: 99%

A Review of Vertical Organic Transistors

Kleemann

Krechan

Fischer

et al. 2020

Adv Funct Materials

127

110

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Powerful electronic devices require performant short‐channel transistors. For organic electronics, though, promising low‐cost and flexible electronic circuits, high processing costs for short channel devices are not acceptable. In this regard, vertical organic transistors (VOTs) are an attractive alternative, and in fact, today they reach the highest transition frequency (40 MHz) and the highest footprint current density (>1 MA cm−2) among all organic transistors. Here, all VOT concepts are reviewed, while discussing device physics, integration approaches, and highlighting the recent developments. The upcoming challenges for the VOT technology are also presented with a guideline for further developments.

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Ultrahigh Mobility in an Organic Semiconductor by Vertical Chain Alignment

Cited by 69 publications

References 56 publications

Uniform electroactive fibre-like micelle nanowires for organic electronics

Uniform electroactive fibre-like micelle nanowires for organic electronics

Organic Planar Heterojunctions: From Models for Interfaces in Bulk Heterojunctions to High‐Performance Solar Cells

A Review of Vertical Organic Transistors

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