Thin-film transistor composites

Phthalocyanines have been used to incorporate semiconductor properties in polymers (182) or to develop a thin-film transistor (183). Phthalocyanines and their derivatives can act as dyes in color photography (qv) (184) or electrophotography (185). Light-sensitive compositions for use on Hthographic plates are comprised in part of copper phthalocyanine blue (186). Dichlorosilicon phthalocyanine [19333-10-9] has been used in the... 

III) and (IV), respectively, and used in the composition of organic thin-film transistors. 

Title Copolymer, Organic Insulating Layer Composition, and Organic Insulating Layer and Organic Thin-Film Transistor Manufactured Using the Same... 

Compositions consisting of poly(oligothiophene-thiazole), ( ), having an Af of 40,000 Da were prepared by Hanh et al. (3) and used as organic insulating films in thin-film transistors in liquid-crystal display devices. 

A great deal of work has been done to characterize the structure of films cast from chemically prepared polythiophenes.96 Most of this work has been conducted on undoped PTh s because of their importance in electronic devices, such as thin-film transistors and photovoltaics. Depending on composition and processing conditions, the crystallinity can be as high as 30% in polythiophenes.97 A layered structure is usually formed in PTh crystals between extended chains held together by ir-slacking, with additional structural order introduced by alkyl side-chain interactions in functionalized PTh s.98 Chemically synthesized PTh powders exhibit a... 

Efforts at loading titanium oxide nanoparticles in PVA (commercially available from Nanophase) have been reported [65], In this report, titanium nanoparticles are dispersed in an aqueous solution of PVA with poly(melamine-co-formaldehyde). The solution is spun onto substrate and heated to generate a cross-Unked polymer-nanoparticle dielectric. A modest enhancement of dielectric constant is achieved for 600-nm thick films. Thin-film transistors using this composite show excellent pen-tacene mobility (> 0.2 cm V s ) and reasonable on/off ratios 10. Vj- —TV is reasonably high, suggesting static charge at the dielectric-semiconductor interface. 

Thin-Film Transistors Based on Polythiophene/lnsulating Polymer Composites with Enhanced Charge Transport... 

Semiconducting Organic Molecule/Polymer Composites for Thin-Film Transistors... 

Graphene attracts enormous interest because of its unique properties. Giant intrinsic charge mobility at room temperature makes it a potential material for nanoelectronics. Its optical and mechanical properties are ideal for micro- and nanomechanical systems, thin-film transistors, transparent and conductive composites, electrodes and for photonics. This Chapter will show that Raman Spectroscopy is a very powerful tool for the investigation of graphene, being very sensitive to phonons, electronic states, defects and to the interaction between the fundamental excitations of graphene. 

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