Preparation of Pentacene Organic Field Effect Transistors by a Wet Process and their Carrier Mobilities

Kubo, H.; Nishide, Junichi; Sasabe, Hiroyuki; Karthaus, Olaf

doi:10.1380/ejssnt.2009.568

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…The charge carrier mobility in crystalline fibers made of pentacene [18] is in the range of 0.1 -1 cm 2 V -1 s -1 [19] which is in the same range as the values reported by others for bottom contact field effect transistors (FETs) [20,21].…”

Section: Electronic and Photonics Applicationssupporting

confidence: 85%

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Self-organization of organic electronics and photonics materials by microdewetting

et al. 2010

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Mesoscopic structures are important for photonics applications. Here we describe the preparation of (sub)micrometer droplet or line patterns of organic semiconductors by a simple casting process. Dewetting during the solvent evaporation leads to the formation of regular structures that are caused by the so-called dissipative structures that develop during nonequilibrium conditions. Controlling the casting conditions (concentration, speed, etc) we were able to tailor the resulting patterns. Examples for the patterns are luminescent or conducting aggregates that can be used as organic transistors. Coating the self-organized structures with metals is an easy process to produce patterend metal surfaces, which can be sued in plasmonics

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Section: Electronic and Photonics Applicationssupporting

confidence: 85%

“…Glass and silicon substrates were cleaned by sonication in alcoholic potassium hydroxide solution, followed by rinsing with water and acetone. The used roller apparatus was described in detail earlier [18,19]. Gold microelectrode patterns were prepared in-house by a lift-off technique.…”

Section: Methodsmentioning

confidence: 99%

Self-organization of organic electronics and photonics materials by microdewetting

et al. 2010

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“…We found that coating an electrode array with a pentacene solution resulted in fiber arrays between source and drain electrodes with charge carrier mobilities of up to 1.6cm 2 V 1 s 1 . 5 In summary, we have shown the potential usefulness of liquid processing of organic materials in patterning the active ingredients of photonic and electronic devices. OLEDs, microlenses, and transistors may just be the beginning.…”

mentioning

confidence: 91%

Self-organized organic electronic and photonic materials by micro-dewetting

Karthaus¹

2010

SPIE Newsroom

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Techniques based on rupture of a thin liquid film to form droplets and line structures create submicrometer-size patterns that are used in making organic LEDs and field-effect transistors. Many electronic and photonic devices require patterning of some of the materials involved. There are three main challenges in this field: decreasing pattern size, increasing throughput, and lowering production cost and energy. The first task is tackled by top-down light-and electron-beam lithographies, as well as bottom-up biomimetic methods using, for example, DNA and protein templates. As a result, pattern sizes are now down to a few nanometers. However, the direct-writing techniques necessary for the highest resolution are very time-consuming, with typical writing speeds of a few tens of micrometers per second. This drawback can be partially resolved by lithographically produced nanoimprint molds that allow roll-to-roll patterning and thus massively parallel production. Still, this approach suffers from technological hurdles, such as requiring complex steppers and lasers. Increasing throughput and reducing cost can also be achieved through solution processes. But the surface tension of liquids does not allow formation of arbitrarily small droplets. Only recently was it reported that a liquid printing process could break the micrometer barrier. 1, 2 Moreover, ink-jet printing is a serial process. Even though arrays of printing heads can be used, it still takes time to prepare large-area patterns. But surface tension does not pose only problems. The very fact that a liquid film or jet contracts and forms droplets can, in principle, be used to make a pattern. If a homogeneous liquid is placed on an unstructured substrate and the liquid breaks up into droplets, a pattern may form where no pattern existed before. Ilya Prigogine was a pioneer in the field of nonequilibrium dynamics and dissipative structures. 3 In applying his theory

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Visible effects of static electric field on physical vapor growth of lead phthalocyanine crystals

Sakai

Iizuka

Nakamura

et al. 2011

Journal of Applied Physics

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To elucidate the effects of a static electric field on the crystal growth of a molecule with both a molecular dipole and a quadrupole moment, we performed physical vapor growth of monoclinic lead phthalocyanine (PbPc) crystals under quasithermal equilibrium conditions and observed distinct effects of the applied electric field on the drift motion of the molecules that diffused over the substrate surface. The density of crystals grown on the Au electrode with a high electric potential exceeds the crystal density on both an electrically grounded electrode and a glass substrate surface. In addition, this difference in crystal density increases with applied voltage. This biased distribution of crystal growth is explained by the drift motion of diffusing molecules, which is induced by the interaction of the electric field with molecular dipole and quadrupole moments. However, the long-range oriented growth that is clearly seen in the physical vapor growth with an electric field for copper phthalocyanine is not observed in the crystal growth of PbPc; only a locally oriented growth is observed in the vicinity of the Au electrode. For electric-field-sensitive PbPc, it is difficult to maintain quasithermal equilibrium conditions over a wide area because the distribution of the diffusing molecules varies as a function of the spatially nonuniform electric field, which disturbs the long-range oriented growth.

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Preparation of Pentacene Organic Field Effect Transistors by a Wet Process and their Carrier Mobilities

Cited by 3 publications

References 7 publications

Self-organization of organic electronics and photonics materials by microdewetting

Self-organization of organic electronics and photonics materials by microdewetting

Self-organized organic electronic and photonic materials by micro-dewetting

Visible effects of static electric field on physical vapor growth of lead phthalocyanine crystals

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