Journal ArticleDOI
Mobility enhancement in conjugated polymer field-effect transistors through chain alignment in a liquid-crystalline phase
Henning Sirringhaus,Richard John Wilson,Richard H. Friend,M. Inbasekaran,Weishi Wu,E. P. Woo,Martin Grell,Donal D. C. Bradley +7 more
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TLDR
In this article, a method is demonstrated by which liquid-crystalline self-organization in rigid-rod nematic conjugated polymers can be used to control the microstructure of the active semiconducting layer in solution-processed polymer thin-film transistors.Abstract:
A method is demonstrated by which liquid-crystalline self-organization in rigid-rod nematic conjugated polymers can be used to control the microstructure of the active semiconducting layer in solution-processed polymer thin-film transistors (TFTs). Enhanced charge carrier mobilities of 0.01–0.02 cm2/V s and good operating stability have been achieved in polyfluorene copolymer TFTs by preparing the polymer in a nematic glassy state and by aligning the polymer chains parallel to the transport direction with the help of an alignment layer. Mobility anisotropies of 5–8 for current flow parallel and perpendicular to the alignment direction have been observed that are of the same order of magnitude as optical dichroic ratios.read more
Citations
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The path to ubiquitous and low-cost organic electronic appliances on plastic
TL;DR: The future holds even greater promise for this technology, with an entirely new generation of ultralow-cost, lightweight and even flexible electronic devices in the offing, which will perform functions traditionally accomplished using much more expensive components based on conventional semiconductor materials such as silicon.
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
Charge transport in organic semiconductors.
Veaceslav Coropceanu,Jérôme Cornil,Demetrio A. da Silva Filho,Yoann Olivier,Robert J. Silbey,Jean-Luc Brédas +5 more
TL;DR: Electronic Coupling in Oligoacene Derivatives: Factors Influencing Charge Mobility, and the Energy-Splitting-in-Dimer Method 3.1.
Journal ArticleDOI
High-Resolution Inkjet Printing of All-Polymer Transistor Circuits
Henning Sirringhaus,Takeo Kawase,Richard H. Friend,Tatsuya Shimoda,M. Inbasekaran,Weishi Wu,E. P. Woo +6 more
TL;DR: It is shown that the use of substrate surface energy patterning to direct the flow of water-based conducting polymer inkjet droplets enables high-resolution definition of practical channel lengths of 5 micrometers, and high mobilities were achieved.
Journal ArticleDOI
Semiconducting π-conjugated systems in field-effect transistors: a material odyssey of organic electronics.
TL;DR: The focus of this review will be on the performance analysis of π-conjugated systems in OFETs, a kind of device consisting of an organic semiconducting layer, a gate insulator layer, and three terminals that provide an important insight into the charge transport of ρconjugate systems.
References
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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
Fast photoconduction in the highly ordered columnar phase of a discotic liquid crystal
Dieter Adam,Peter Schuhmacher,Jürgen Simmerer,L. Häussling,K. Siemensmeyer,K. H. Etzbachi,Helmut Ringsdorf,Dietrich Haarer +7 more
TL;DR: In this article, it was shown that a highly ordered columnar phase of disk-like organic molecules can exhibit high mobilities for photoinduced charge carriers, of the order of 0.1 cm2 V-1 s-1, higher than for any organic material other than single-crystal phases.
Journal ArticleDOI
Interplay of Physical Structure and Photophysics for a Liquid Crystalline Polyfluorene
TL;DR: In this article, a structural model based on intrachain ordering was proposed to account for the changes of the absorption spectrum of poly(9,9-dioctylfluorene) (PFO) films under certain physicochemical treatment protocols.
Journal ArticleDOI
Polarized Luminescence from Oriented Molecular Materials
Martin Grell,Donal D. C. Bradley +1 more
TL;DR: The field of organic EL has rapidly established itself as a new branch of applied science and materials chemistry has allowed access tothe full color spectrum, and the critical device performanceparameters ofbrightness,powerefficiency,andstability have been improved to the point of commercial viability as mentioned in this paper.
Journal ArticleDOI
Chain geometry, solution aggregation and enhanced dichroism in the liquidcrystalline conjugated polymer poly(9,9-dioctylfluorene)
TL;DR: In this article, the physical characterization of a dioctyl-substituted polyfluorene, both in solution and in the solid state, is reported, and the effects on absorption and emission spectra of intermolecular interactions that lead to gelation or precipitation from solution are reported.