Semiconductors Film transistors

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... 

ORGANIC SEMICONDUCTOR THIN-FILM TRANSISTOR SENSORS... 

Polymers such as PTV have potential applications as the active semiconductor layer in thin-film transistors (TFTs). 

As described earlier, the covalently bonded hydrogen, by passivating dangling bond defects and removing strained weak Si—Si bonds from the network, dramatically improves the semiconducting quality of amorphous silicon. Hence without the presence of hydrogen, effective amorphous semiconductor devices such as solar cells or thin film transistors would not be possible. Unfortunately, low defect density, high electronic quality... 

Nomura, K. Ohta, H. Ueda, K. Kamiya, T. Hirano, M. Hosono, H. 2003. Thin-film transistor fabricated in single-crystalline transparent oxide semiconductor. Science 300 1269-1273. 

Mitzi, D. B. Copel, M. Murray, C. E. Kosbar, L. L. Afzali, A. 2005. Thin-film transistors based on spin-coated chalcogenide semiconductor channels. Proceedings—Electrochemical Society, 2004-15 (Thin Film Transistor Technologies (TFTT VII)). pp. 189-199. 

Duan, X. Niu, C. Sahi, V. Chen, J. Parce, J. W. Empedocles, S. Goldman, J. L. 2003. High-performance thin-film transistors using semiconductor nanowires and nanoribbons. Nature 425 274-278. 

Katz, H. Laquindanum, J. 1999. Thin film transistor and organic semiconductor material thereof. V S. Patent 5,936,259. 

Cao, Q. et al. 2006. Highly bendable, transparent thin-film transistors that use carbon-nanotube-based conductors and semiconductors with elastomeric dielectrics. Adv. Mater. 18 304-309. 

Field-effect transistors (FETs) Heterojunction bipolar transistors (HBTs) High electron mobility transistors (HEMTs) Metal oxide semiconductor FETs (MOSFETs) Single-electron transistors (SETs) Single-heterojunction HBTs (SH-HBTs) Thin-film transistors (TFTs) hydrogenated amorphous silicon in, 22 135... 

Kang MJ, Doi 1, Mori H, Miyazaki E, Takimiya K, Ikeda M, Kuwabara H (2011) Alkylated dinaphtho[2,3-b 2, 3 -f]thieno[3,2-b]thiophenes (C -DNTTs) organic semiconductors for high-performance thin-film transistors. Adv Mater 23 1222-1225... 

The fabrication of active semiconductor devices from amorphous semiconductor films is a further application that offers considerable advantages. Thin-fihn transistors, based on amorphous films of hydrogenated silicon, are nnder intensive development. Other devices with monostable and bistable switching characteristics have also received considerable interest. Naturally enough, the performance of snch devices is intimately related to the transport properties of charge carriers in the materials employed. 

In investigations by the authors (4) and Li et al. (5), polythieno[3,2-b]thio-phenes, (II) and (III), respectively, were prepared and used as semiconductors and in electronics as organic thin-film transistors. 

Hirai (2) prepared an organic semiconductor layer for an organic thin-film transistor consisting of pentacene derivatives, (II), having a thickness of 1 pm. 

Heteroacene derivatives, (I), were prepared by Park et al. (1), which were effective as organic thin-film transistors. Low-molecular-weight thiophene oligomers were also prepared by Hahn et aL (2) and used as organic semiconductors. 

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