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Solution-processable barium titanate and strontium titanate nanoparticle dielectrics for low-voltage organic thin-film transistors.

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Solution-processable barium titanate and strontium titanate nanoparticle dielectrics for low-voltage organic thin-film transistors.

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dc.contributor.author Cai, Qin Jia.
dc.contributor.author Gan, Ye.
dc.contributor.author Chan-Park, Mary B.
dc.contributor.author Yang, Hongbin.
dc.contributor.author Lu, Zhisong.
dc.contributor.author Li, Chang Ming.
dc.contributor.author Guo, Jun.
dc.contributor.author Dong, Zhili.
dc.date.accessioned 2011-12-13T07:52:03Z
dc.date.available 2011-12-13T07:52:03Z
dc.date.copyright 2009
dc.date.issued 2011-12-13
dc.identifier.citation Cai, Q. J., Gan, Y., Chan-Park, M. B., Yang, H. B., Lu, Z. S., Li, C. M., & et al. (2009). Solution-Processable Barium Titanate and Strontium Titanate Nanoparticle Dielectrics for Low-Voltage Organic Thin-Film Transistors. Chemistry of Materials, 21 (14), 3153–3161.
dc.identifier.uri http://hdl.handle.net/10220/7398
dc.description.abstract A series of solution-processable oleic-acid capped barium titanate and strontium titanate nanoparticles was synthesized and spin-coated to form homogeneous high-k dielectric films for organic thin-film transistors (TFTs). The dielectric constant k of the nanoparticle films was tunable in the range from 4.1 to 9.3 by altering the molar ratio of oleic-acid surfactant to synthesis precursor. Low-voltage modulated high-performance organic TFTs were fabricated using nanoparticle films as the dielectric components. Flexible bottom-gate pentacene TFTs exhibited outstanding device performance with field-effect mobility, μ, in the range of 2.0−3.5 cm2 V−1 s−1 and on/off ratios of about 1 × 104 at low gate voltage. Top-gate poly(3,3′′′-didodecylquaterthiophene) TFTs also showed high device performance with μ of 0.05−0.1 cm2 V−1 s−1 and on/off ratios of 1 × 103 to 1 × 104. The low-voltage performance of the TFTs could be attributed to a low density of trapped states at the interfaces between the organic semiconductors and the nanoparticle dielectric films. This research provides a series of promising dielectric materials for fabrication of superior organic TFTs through a solution process and fundamentally suggests that low trapped state density at the semiconductor/dielectrics interface may be an important factor to achieve low-voltage modulation in organic TFTs.
dc.language.iso en
dc.relation.ispartofseries Chemistry of materials
dc.rights © 2009 American Chemical Society
dc.subject DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films.
dc.title Solution-processable barium titanate and strontium titanate nanoparticle dielectrics for low-voltage organic thin-film transistors.
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1021/cm900532q

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