Browsing by Subject "Thin-film transistor (TFTs)"

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    Demonstration of flexible thin film transistors with GaN channels
    (American Institute of Physics Inc., 2016) Bolat, S.; Sisman, Z.; Okyay, Ali Kemal
    We report on the thin film transistors (TFTs) with Gallium Nitride (GaN) channels directly fabricated on flexible substrates. GaN thin films are grown by hollow cathode plasma assisted atomic layer deposition (HCPA-ALD) at 200 °C. TFTs exhibit 103 on-to-off current ratios and are shown to exhibit proper transistor saturation behavior in their output characteristics. Gate bias stress tests reveal that flexible GaN TFTs have extremely stable electrical characteristics. Overall fabrication thermal budget is below 200 °C, the lowest reported for the GaN based transistors so far. © 2016 Author(s)
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    Thin-film ZnO charge-trapping memory cell grown in a single ALD step
    (Institute of Electrical and Electronics Engineers, 2012-10-26) Oruc, F. B.; Cimen, F.; Rizk, A.; Ghaffari, M.; Nayfeh, A.; Okyay, Ali Kemal
    A thin-film ZnO-based single-transistor memory cell with a gate stack deposited in a single atomic layer deposition step is demonstrated. Thin-film ZnO is used as channel material and charge-trapping layer for the first time. The extracted mobility and subthreshold slope of the thin-film device are 23 cm2/V · s and 720 mV/dec, respectively. The memory effect is verified by a 2.35-V hysteresis in the $I\rm drain- $V\rm gate curve. Physics-based TCAD simulations show very good agreement with the experimental results providing insight to the charge-trapping physics.