Hydrostatic-pressure dependence of organic thin-film transistor current versus voltage characteristics

Rang, Zhenlin; Nathan, M. I.; Ruden, P. P.; Chesterfield, Reid J.; Frisbie, C. Daniel

doi:10.1063/1.1829388

Cited by 27 publications

(13 citation statements)

References 19 publications

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“…Pressure also affects the crystal structure and the vibrational spectra, which inevitably modifies μ . Strong reversible increases of the drain current and the field‐effect hole mobility with increasing pressure (up to 300 MPa) were observed for pentacene OFETs, in particular, for a device with a relatively low current . Similar nearly‐linear increase of the mobility with pressure (up to 500 MPa) was observed for rubrene .…”

Section: Towards Advanced Modeling Of Charge Transportsupporting

confidence: 68%

Impact of Low‐Frequency Vibrations on Charge Transport in High‐Mobility Organic Semiconductors

Sosorev

Maslennikov

Kharlanov

et al. 2018

Physica Rapid Research Ltrs

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Despite decades of intensive studies of charge transport in organic semiconductors (OSs), understanding of mechanisms underpinning efficient charge transport in them remains elusive. Recently, it has been suggested that low‐frequency (LF) vibrations are a limiting factor of charge transport in high‐mobility OSs. Nevertheless, the relationship between the molecular structure, crystal packing, LF vibrations, and charge transport is still obscured. This hinders the focused search of high‐mobility OSs so that researchers rely mainly on trial‐and‐error method. This review presents theoretical and experimental approaches to studying the LF vibrations and their role in charge transport with a focus on recent results. It is anticipated that tight cooperation between experimentalists and theorists will yield an advanced understanding of LF vibrations in OSs and their impact on charge transport. This will guide the design of novel high‐mobility organic semiconductors for organic electronics.

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Section: Towards Advanced Modeling Of Charge Transportsupporting

confidence: 68%

Impact of Low‐Frequency Vibrations on Charge Transport in High‐Mobility Organic Semiconductors

Sosorev

Maslennikov

Kharlanov

et al. 2018

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

show abstract

“…[251] The sensitivity of films of 22 to a variety of analytes have led to their use as sensors. [252] Changes in pentacene device mobility as a function of applied external pressure [253] has been used to create mechanical force and pressure sensors, [254] as well as conformable pressure sensors. [255] Pentacene monolayers were found to improve wetting and crystallinity of subsequently deposited C 60 layers, leading to improved performance of fullerene transistors (electron mobility up to 2 cm 2 V À1 s À1 ).…”

Section: Methodsmentioning

confidence: 99%

The Larger Acenes: Versatile Organic Semiconductors

2007

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Acenes have long been the subject of intense study because of the unique electronic properties associated with their pi-bond topology. Recent reports of impressive semiconductor properties of larger homologues have reinvigorated research in this field, leading to new methods for their synthesis, functionalization, and purification, as well as for fabricating organic electronic components. Studies performed on high-purity acene single crystals revealed their intrinsic electronic properties and provide useful benchmarks for thin film device research. New approaches to add functionality were developed to improve the processability of these materials in solution. These new functionalization strategies have recently allowed the synthesis of acenes larger than pentacene, which have hitherto been largely unavailable and poorly studied, as well as investigation of their associated structure/property relationships.

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“…Recently, we reported a method of measuring the effects of hydrostatic pressure on charge carrier conductivity in organic semiconductor crystals, introducing the charge by the application of an electric field at the semiconductor surface [20,21]. In addition to the measurement of a commonly used transfer characteristic (the drain current, I D ) as a function of gate voltage (V G ) reported in prior studies [22][23][24], we performed four-terminal conductivity measurements to exclude the external influence of metal-to-semiconductor contact resistance. Moreover, we simultaneously measured the Hall coefficient to ensure calculation of the correct pressure coefficient when estimating the change in the dielectric capacitance and the thickness of the gate dielectric insulators, thus providing a means of studying the so-called"structure-property" relationships.…”

Section: Charge Coherence In High-performance Organic Transistorsmentioning

confidence: 99%

Materials and devices with applications in high-end organic transistors

et al. 2014

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The development of functional materials typically benefits from an understanding of the microscopic mechanisms by which those materials operate. To accelerate the development of organic semiconductor devices with industrial applications in flexible and printed electronics, it is essential to elucidate the mechanisms of charge transport associated with molecular-scale charge transfer. In this study, we employed Hall effect measurements to differentiate coherent band transport from site-to-site hopping. The results of tests using several different molecular systems as the active semiconductor layers demonstrate that high-mobility charge transport in recently-developed solution-crystallized organic transistors is the result of a band-like mechanism. These materials, which have the potential to be organic transistors exhibiting the highest speeds ever obtained, are significantly different from the conventional lower-mobility organic semiconductors with incoherent hopping-like transport mechanisms which were studied in the previous century. They may be categorized as "high-end" organic semiconductors, characterized by their coherent electronic states and high values of mobility which are close to or greater than 10 cm 2 /Vs.

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Hydrostatic-pressure dependence of organic thin-film transistor current versus voltage characteristics

Cited by 27 publications

References 19 publications

Impact of Low‐Frequency Vibrations on Charge Transport in High‐Mobility Organic Semiconductors

Impact of Low‐Frequency Vibrations on Charge Transport in High‐Mobility Organic Semiconductors

The Larger Acenes: Versatile Organic Semiconductors

Materials and devices with applications in high-end organic transistors

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