Journal ArticleDOI
Controlled orientation of liquid-crystalline polythiophene semiconductors for high-performance organic thin-film transistors
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In this article, a silane self-assembled monolayer (SAM) modification of a SiO2 gate dielectric surface improved the molecular ordering of organic channel semiconductor in organic thin-film transistors, leading to a significant improvement in transistor performance.Abstract:
The silane self-assembled monolayer (SAM) modification of a SiO2 gate dielectric surface improved the molecular ordering of organic channel semiconductor in organic thin-film transistors (OTFTs), leading to a significant improvement in transistor performance. Mobility of up to 0.18cm2∕Vs (current on∕off ratio of 107) was obtained for OTFTs with a liquid-crystalline polythiophene semiconductor built on an octyltrichlorosilane-modified SiO2 gate dielectric layer, a 450 times improvement over those built on a nonmodified dielectric layer. The mobility enhancement was attributed to the edge-on orientation of the polythiophene molecules induced by the silane SAM layer as deduced from the crystal domain structures in the atomic force microscopic images.read more
Citations
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Journal ArticleDOI
Inkjet-printed graphene electronics.
Felice Torrisi,Tawfique Hasan,Weiping Wu,Zhipei Sun,Antonio Lombardo,Tero S. Kulmala,Gen-Wen Hsieh,Sungjune Jung,Francesco Bonaccorso,Philip J. Paul,Daping Chu,Andrea C. Ferrari +11 more
TL;DR: In this paper, a graphene-based ink by liquid phase exfoliation of graphite in N-methylpyrrolidone was used to print thin-film transistors, with mobilities up to ∼95 cm2 V 1 s−1, as well as transparent and conductive patterns, with ∼80% transmittance and ∼30 kΩ/□ sheet resistance.
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Ink-Jet Printed Graphene Electronics
Felice Torrisi,Tawfique Hasan,W. Wu,Zhipei Sun,Antonio Lombardo,Tero S. Kulmala,G. W. Hshieh,S. J. Jung,Francesco Bonaccorso,P. J. Paul,Daping Chu,Andrea C. Ferrari +11 more
TL;DR: Inkjet printing is demonstrated as a viable method for large-area fabrication of graphene devices, and a graphene-based ink is produced by liquid phase exfoliation of graphite in N-methylpyrrolidone, paving the way to all-printed, flexible, and transparent graphene devices on arbitrary substrates.
Journal ArticleDOI
Highly oriented crystals at the buried interface in polythiophene thin-film transistors
TL;DR: In this paper, the authors used X-ray diffraction rocking curves to provide direct evidence for highly oriented crystals at the critical buried interface between the polymer and the dielectric where the current flows in thin-film transistors.
Journal ArticleDOI
2D-Crystal-Based Functional Inks
TL;DR: The exfoliation strategies of graphite and other layered crystals are reviewed, along with the advances in the sorting of lateral size and thickness of the exfoliated sheets together with the formulation of functional inks and the current development of printing/coating processes of interest for the realization of 2D-crystal-based devices.
Journal ArticleDOI
Charge transport in polymeric transistors
TL;DR: In this paper, two families of conjugated polymers, fluorene copolymers and polythiophenes, are reviewed and charge transport models based on microstructure are used to identify the electrical bottlenecks in these materials.
References
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Journal ArticleDOI
Organic Thin Film Transistors for Large Area Electronics
TL;DR: In this article, the authors present new insight into conduction mechanisms and performance characteristics, as well as opportunities for modeling properties of organic thin-film transistors (OTFTs) and discuss progress in the growing field of n-type OTFTs.
Journal ArticleDOI
Two-dimensional charge transport in self-organized, high-mobility conjugated polymers
Henning Sirringhaus,Peter J. Brown,Richard H. Friend,Martin Nielsen,Klaus Bechgaard,B.M.W. Langeveld-Voss,A. J. H. Spiering,René A. J. Janssen,E. W. Meijer,P. T. Herwig,Dago M. de Leeuw +10 more
TL;DR: In this article, the authors used thin-film, field effect transistor structures to probe the transport properties of the ordered microcrystalline domains in the conjugated polymer poly(3-hexylthiophene), P3HT.
Journal ArticleDOI
Integrated Optoelectronic Devices Based on Conjugated Polymers
TL;DR: An all-polymer semiconductor integrated device is demonstrated with a high-mobility conjugated polymer field-effect transistor driving a polymer light-emitting diode (LED) of similar size, which represents a step toward all- polymer optoelectronic integrated circuits such as active-matrix polymer LED displays.
MonographDOI
Handbook of liquid crystals
John W. Goodby,Peter J. Collings,Takashi Kato,Carsten Tschierske,Helen F. Gleeson,Peter Raynes +5 more
TL;DR: In this article, the basic principles of both low and high-molecular weight materials, as well as the synthesis, characterization, modification, and applications of all types of liquid crystals are discussed.
Journal ArticleDOI
Soluble and processable regioregular poly(3‐hexylthiophene) for thin film field‐effect transistor applications with high mobility
TL;DR: In this paper, the electrical characteristics of field effect transistors using solution cast regioregular poly(3-hexylthiophene) are discussed and the authors demonstrate that both high field effect mobilities (ca. 0.045 cm2/V) and relatively high on/off current ratios (greater than 103) can be achieved.