Transition Between Band and Hopping Transport in Polymer Field‐Effect Transistors

Yamashita, Yu; Tsurumi, Junto; Hinkel, Felix; Okada, Yugo; Soeda, Junshi; Zaja̧czkowski, Wojciech M.; Baumgarten, Martin; Pisula, Wojciech; Matsui, Hiroyuki; Müllen, Kläus; Takeya, Jun

doi:10.1002/adma.201403767

Cited by 64 publications

(82 citation statements)

References 31 publications

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“…[12,13] To the best of our knowledge, band-like temperature dependence of electron mobility in OTFTs was only documented with an ambipolar polymer. [8] To understand the nature of the band-like regime and to identify the microstructures that favor its occurrence, it is of great fundamental importance to discover and characterize other high mobility organic semiconductors, particularly n-type semiconductors.…”

Section: Doi: 101002/adma201601171mentioning

confidence: 99%

Electron Mobility Exceeding 10 cm² V⁻¹ s⁻¹ and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors

et al. 2016

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Solution-processed n-channel organic thin-film transistors (OTFTs) that exhibit a field-effect mobility as high as 11 cm(2) V(-1) s(-1) at room temperature and a band-like temperature dependence of electron mobility are reported. By comparison of solution-processed OTFTs with vacuum-deposited OTFTs of the same organic semiconductor, it is found that grain boundaries are a key factor inhibiting band-like charge transport.

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Section: Doi: 101002/adma201601171mentioning

confidence: 99%

Electron Mobility Exceeding 10 cm² V⁻¹ s⁻¹ and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors

et al. 2016

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“…The Lorentz force being directly proportional to the velocity of the carriers, conventional thinking leads to the conclusion that high mobility inorganic semiconductors are expected to exhibit an ideal Hall effect upon gate accumulation while lower performance organic semiconductors, mostly affected by dynamic disorder, should produce nonideal answers . Obviously, standstill deep trapped carriers for which the Lorentz force is zero won't contribute.…”

Section: Charge Transportmentioning

confidence: 99%

Molecular Semiconductors for Logic Operations: Dead‐End or Bright Future?

et al. 2020

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The field of organic electronics has been prolific in the last couple of years, leading to the design and synthesis of several molecular semiconductors presenting a mobility in excess of 10 cm2 V−1 s−1. However, it is also started to recently falter, as a result of doubtful mobility extractions and reduced industrial interest. This critical review addresses the community of chemists and materials scientists to share with it a critical analysis of the best performing molecular semiconductors and of the inherent charge transport physics that takes place in them. The goal is to inspire chemists and materials scientists and to give them hope that the field of molecular semiconductors for logic operations is not engaged into a dead end. To the contrary, it offers plenty of research opportunities in materials chemistry.

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“…12 Band-like transport in organic materials is now well established in the case of small molecules, both for single crystals 14,15,16,17 and more recently for thin films. 18,19 Likely because of the intrinsically higher degree of disorder in polymer semiconductors, very few cases of inverted temperature activated transport have been demonstrated for p-type polymer devices, 20,21,22,23 and only a single one for ntype ones. 24 The observation of such inverted temperature activation has been so far assigned either to a specific chemical structure, 24 to processing conditions, 20 or to the degree of backbone alignment.…”

Section: Introductionmentioning

confidence: 99%

Microstructural control suppresses thermal activation of electron transport at room temperature in polymer transistors

et al. 2019

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Recent demonstrations of inverted thermal activation of charge mobility in polymer field-effect transistors have excited the interest in transport regimes not limited by thermal barriers. However, rationalization of the limiting factors to access such regimes is still lacking. An improved understanding in this area is critical for development of new materials, establishing processing guidelines, and broadening of the range of applications. Here we show that precise processing of a diketopyrrolopyrrole-tetrafluorobenzene-based electron transporting copolymer results in single crystal-like and voltage-independent mobility with vanishing activation energy above 280 K. Key factors are uniaxial chain alignment and thermal annealing at temperatures within the melting endotherm of films. Experimental and computational evidences converge toward a picture of electrons being delocalized within crystalline domains of increased size. Residual energy barriers introduced by disordered regions are bypassed in the direction of molecular alignment by a more efficient interconnection of the ordered domains following the annealing process.

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Transition Between Band and Hopping Transport in Polymer Field‐Effect Transistors

Cited by 64 publications

References 31 publications

Electron Mobility Exceeding 10 cm² V⁻¹ s⁻¹ and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors

Electron Mobility Exceeding 10 cm² V⁻¹ s⁻¹ and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors

Molecular Semiconductors for Logic Operations: Dead‐End or Bright Future?

Microstructural control suppresses thermal activation of electron transport at room temperature in polymer transistors

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Transition Between Band and Hopping Transport in Polymer Field‐Effect Transistors

Cited by 64 publications

References 31 publications

Electron Mobility Exceeding 10 cm2 V−1 s−1 and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors

Electron Mobility Exceeding 10 cm2 V−1 s−1 and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors

Molecular Semiconductors for Logic Operations: Dead‐End or Bright Future?

Microstructural control suppresses thermal activation of electron transport at room temperature in polymer transistors

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Product

Resources

About

Electron Mobility Exceeding 10 cm² V⁻¹ s⁻¹ and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors

Electron Mobility Exceeding 10 cm² V⁻¹ s⁻¹ and Band‐Like Charge Transport in Solution‐Processed n‐Channel Organic Thin‐Film Transistors