Highly Efficient Patterning of Organic Single‐Crystal Transistors from the Solution Phase

Mannsfeld, Stefan C. B.; Sharei, Armon; Liu, Shuhong; Roberts, Mark; McCulloch, Iain; Heeney, Martin; Bao, Zhenan

doi:10.1002/adma.200703244

Cited by 104 publications

(80 citation statements)

References 21 publications

(19 reference statements)

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“…S7). In comparison, other patterning methods used to create patterned OSCs for isolated OTFTs have shown relative variances ranging from 20% to 84% (9,15,17,22,31,32,35,42,(48)(49)(50)(51)(52)(53)(54). For example, Li et al (15) have shown that using a PMMA:C8BTBT blend on a solution wetting pattern can deposit crystal plates that have a mobility relative variance of >40%.…”

Section: Resultsmentioning

confidence: 99%

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Park

Giri

Shaw

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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The electronic properties of solution-processable small-molecule organic semiconductors (OSCs) have rapidly improved in recent years, rendering them highly promising for various low-cost largearea electronic applications. However, practical applications of organic electronics require patterned and precisely registered OSC films within the transistor channel region with uniform electrical properties over a large area, a task that remains a significant challenge. Here, we present a technique termed "controlled OSC nucleation and extension for circuits" (CONNECT), which uses differential surface energy and solution shearing to simultaneously generate patterned and precisely registered OSC thin films within the channel region and with aligned crystalline domains, resulting in low device-to-device variability. We have fabricated transistor density as high as 840 dpi, with a yield of 99%. We have successfully built various logic gates and a 2-bit halfadder circuit, demonstrating the practical applicability of our technique for large-scale circuit fabrication.organic semiconductors | patterning | small molecules | transistors | circuits

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Section: Resultsmentioning

confidence: 99%

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Park

Giri

Shaw

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…[28][29][30][31][32] Patterning organic semiconductors reduces or eliminates parasitic current paths (crosstalk) between neighboring devices, and results in a significant decrease of the ''off'' current. [33][34][35] In the past decade, many techniques such as shadow masking, screen printing, inkjet printing, and softlithography have been developed to pattern organic semicon-REVIEW www.advmat.de ductor thin films, and this topic has been extensively reviewed. [36][37][38] However, compared to their thin-film counterparts, organic semiconductor single crystals have been patterned with limited success until recently.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the difficulties in device fabrication, organic single-crystal devices have been traditionally limited to fundamental charge-transport studies despite their superior performance and outstanding electrical characteristics. [35,39] Organic single-crystal FETs are usually fabricated by manual selection and placing of individual crystals, a tedious process for producing devices at high density and with reasonable throughput. [40] Recently, a patterning technique was reported that enabled direct deposition of large arrays of a wide range of organic single crystals onto prefabricated transistor source-drain electrodes.…”

Section: Introductionmentioning

confidence: 99%

Controlled Deposition of Crystalline Organic Semiconductors for Field‐Effect‐Transistor Applications

et al. 2009

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The search for low‐cost, large‐area, flexible devices has led to a remarkable increase in the research and development of organic semiconductors, which serve as one of the most important components for organic field‐effect transistors (OFETs). In the current review, we highlight deposition techniques that offer precise control over the location or in‐plane orientation of organic semiconductors. We focus on various vapor‐ and solution‐processing techniques for patterning organic single crystals in desired locations. Furthermore, the alignment of organic semiconductors via different methods relying on mechanical forces, alignment layers, epitaxial growth, and external magnetic and electric fields are surveyed. The advantages, limitations, and applications of these techniques in OFETs are also discussed.

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“…This method is useful in depositing crystals of small OS molecules that are otherwise difficult to form films. Furthermore, it is possible to have fine control over the crystallization conditions by choosing the initial concentration and host-liquid temperature [360,369].…”

Section: Patterned Deposition Os Crystalsmentioning

confidence: 99%

Organic semiconductors for device applications: current trends and future prospects

Ahmad

2014

Journal of Polymer Engineering

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Abstract:With the rich experience of developing silicon devices over a period of the last six decades, it is easy to assess the suitability of a new material for device applications by examining charge carrier injection, transport, and extraction across a practically realizable architecture; surface passivation; and packaging and reliability issues besides the feasibility of preparing mechanically robust wafer/substrate of single-crystal or polycrystalline/ amorphous thin films. For material preparation, parameters such as purification of constituent materials, crystal growth, and thin-film deposition with minimum defects/ disorders are equally important. Further, it is relevant to know whether conventional semiconductor processes, already known, would be useable directly or would require completely new technologies. Having found a likely candidate after such a screening, it would be necessary to identify a specific area of application against an existing list of materials available with special reference to cost reduction considerations in large-scale production. Various families of organic semiconductors are reviewed here, especially with the objective of using them in niche areas of large-area electronic displays, flexible organic electronics, and organic photovoltaic solar cells. While doing so, it appears feasible to improve mobility and stability by adjusting π-conjugation and modifying the energy bandgap. Higher conductivity nanocomposites, formed by blending with chemically conjugated C-allotropes and metal nanoparticles, open exciting methods of designing flexible contact/interconnects for organic and flexible electronics as can be seen from the discussion included here.

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Highly Efficient Patterning of Organic Single‐Crystal Transistors from the Solution Phase

Cited by 104 publications

References 21 publications

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Controlled Deposition of Crystalline Organic Semiconductors for Field‐Effect‐Transistor Applications

Organic semiconductors for device applications: current trends and future prospects

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