Thin-film Transistor Device Structures

Thin-film Transistor Device Structures 11.3.2.1 Amorphous Silicon TFTs... 

Figure 10.13. (a) SEM image of ZnO nanorods coated with octylamine. Scale bar, 200 nm. (b) Uniform nanorod film fabricated by spin coating of ZnO nanorods. Scale bar, 500 nm. The nanorods assemble into domains with nematic ordering, (c) Saturated transfer characteristics for a thin-film transistor fabricated by spin coating of ZnO nanorods with different ligands octylamine (solid line), butylamine (dashed line). Vi = 60V. (d) Output characteristics of a spin-coated device made from octylamine-stabilized ZnO nanorods.The device structure is shown in the inset in (c). Reproduced from Ref. 83, Copyright 2006, with permission from the American Chemical Society. 

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... 

Nano-technology will play a prominent role in the future synthesis of molecular thin films and devices. Nano-technology is defined as the study and manufacture of structures and devices with dimensions about the size of a molecule. Nano-scale physics and chemistry might lead directly to the smallest and fastest transistors and the strongest and lightest materials ever made [2], Likewise, bio-catalysts such as proteins will be increasingly used to facilitate relevant chemical reactions at ambient conditions. Natural macromolecules will be explored to provide selectivity similar to inorganic chemicals such as zeolites. 

ORGANIC THIN-FILM TRANSISTOR SENSORS 6.2.3.1 Device Structure... 

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