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- W2169922219 abstract "We report on the fabrication of organic thin film transistors (OTFTs), which operate at low voltages, by incorporating a nanocomposite gate insulator material consisting of titania (TiO2) nanoparticles used as fillers and poly(4-vinyl phenol) (PVP) used as matrix. The surface of the nanoparticles was modified by the ligands, 4-hydroxybenzoic acid, to enhance their compatibility with the polymer. The structure of the ligand is similar to that of the repeat units in the polymer. Once the nanoparticles were homogeneously dispersed in the polymer matrix, they were immobilized by cross-linking PVP with poly(melamine-co-formaldehyde) methylated/butylated (cross-linker). Consequently, no significant aggregation of the nanoparticles, even at a concentration of 31 wt%, was found in the nanocomposites, as observed by transmission electron microscopy (TEM). As a result, the nanocomposite exhibited a low leakage current density (∼10−8 A/cm−2). With an increase in the concentration of TiO2 nanoparticles added, the dielectric constant of the nanocomposites also increased proportionately as compared to that of pristine PVP. The performance of the OTFTs in terms of the charge carrier mobility, on/off ratio, threshold voltages, and hysteresis was evaluated. In addition, the relationship between the concentration of TiO2 nanoparticles and the device performance is discussed in detail." @default.
- W2169922219 created "2016-06-24" @default.
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- W2169922219 date "2013-12-01" @default.
- W2169922219 modified "2023-09-27" @default.
- W2169922219 title "TiO2-poly(4-vinylphenol) nanocomposite dielectrics for organic thin film transistors" @default.
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- W2169922219 doi "https://doi.org/10.1016/j.orgel.2013.09.007" @default.
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