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Due to the increasing miniaturization, lightweight, wearable, and portable electronic devices, there is an increasing need to reduce power consumption through the lower operating voltages of thin-film transistors (TFTs). In this study, we proposed a "water-in-bisalt" (WiBS) and an ultraviolet (UV)-curable polymer composite material, which is an aqueous electrolyte with a high capacitance, and realized a dielectric material for low power consumption and a stable voltage range of TFTs that can be handled in the ambient condition. We fabricated a free-standing WiBS/polymer dielectric film with a high capacitance value of 6.72 uF/cm2 at 0.5 Hz and high electrochemical stability by embedding a WiBS electrolyte into the UV crosslinked polymer network by photocuring. The devices of InOx TFTs using WiBS/polymer dielectric films show excellent electrical characteristics: an on/off current ratio of over 103, a subthreshold swing of 110 mV/dec at a drain voltage of 0.1 V, and a linear field-effect mobility of 30.7 cm2/Vs at a drain voltage of 0.1 V and a gate voltage of 1 V. [ABSTRACT FROM AUTHOR]

Chemical imprinting was conducted on ZnO semiconductor films via a chemical reaction at the contact regions between a micro-patterned PDMS stamp and ZnO films. In addition, we applied the chemical imprinting on Li doped ZnO thin films for high performance TFTs fabrication. The representative micro-patterned Li doped ZnO TFTs showed a field effect mobility of 4.2 cm2 V−1 s−1 after sintering at 300 °C. [ABSTRACT FROM AUTHOR]

Se nanowires were grown in a confined geometry of polymer thin films by adjusting the coordination strength between the polymer chains and Se atoms, and they were in situaligned during the reaction in a patterned substrate. [ABSTRACT FROM AUTHOR]

Pentacene organic thin film transistors (OTFTs) with low-k and high-k hybrid gate dielectrics by CF4 plasma treatment exhibited excellent device performance with field effect mobilities (maximum 1.41 cm2/V s), a low threshold voltage of +1 V, and on/off current ratios of 105 at -5 V gate bias. After CF4 plasma treatment, fluorine atoms diffuse into the interior low-k polymer and eliminate ionic impurities which reduce the leakage current density and overall pentacene initial growth on the superhydrophobic surface is significantly improved. It seems apparent that proper surface treatment is desirable for higher quality pentacene film and improving the performance of OTFTs. [ABSTRACT FROM AUTHOR]

Abstract: Transparent super-hydrophobic films were fabricated using the PDMS method and silane process, based on anodization in phosphoric acid. Contact angle tests were performed to determine the contact angle of each film according to the anodizing time. Transmittance tests also were performed to obtain the transparency of each TPT (trimethylolpropane propoxylate triacrylate) replica film according to the anodizing time. The contact angle was determined by studying the drop shape, and the transmittance was measured using a UV-spectrometer. The contact angle increases with increasing anodizing time, because increasing pillar length can trap more air between the TPT replica film and a drop of water. The transmittance falls with increasing anodizing time because the increasing pillar length causes a scattering effect. This study shows that the pillar length and transparency are inversely proportional. The TPT replica film having nanofibers array structures was better than other films in aspect of self-cleaning by doing quantitative experimentation. [Copyright &y& Elsevier]