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- W2305008328 abstract "Abstract We investigated the electrical properties and stability of short-channel half-Corbino amorphous In–Ga–Zn–O (a-IGZO) thin-film transistors (TFTs). In the linear region, the fabricated half-Corbino a-IGZO TFT with a channel length of 4.5 μm achieves a geometrical factor ( f g ) of ∼2.7, a threshold voltage ( V T ) of ∼2.4 V, a field-effect mobility ( μ eff ) of ∼15 cm 2 /Vs, a subthreshold swing ( SS ) of ∼320 mV/dec and an off-current ( I OFF ) −13 A. In the saturation region, asymmetric electrical characteristics such as drain current were observed under different drain bias conditions. The electrical properties asymmetry of half-Corbino a-IGZO TFTs was explained by various geometrical factors owing to the short-channel effect. The reduced V T and increased SS at V DS = 15 V is explained by the drain-induced Schottky barrier lowering. In addition, the bias-temperature stress (BTS) was performed for half-Corbino a-IGZO TFTs with both amorphous silicon oxide (a-SiO x ) single layer and a-SiO x /amorphous silicon nitride (a-SiN x ) bilayer passivation (PV) structures. The device with bilayer PV shows a threshold voltage shift (Δ V T ) of +2.07 and −0.5 V under positive (PBTS = +15 V) and negative BTS (NBTS = −15 V) at 70 °C for 10 ks, respectively. The origins of Δ V T during PBTS and NBTS for half-Corbino a-IGZO TFTs with single and bilayer PV structures were studied. To improve the device electrical stability, the bilayer PV structure should be used." @default.
- W2305008328 created "2016-06-24" @default.
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- W2305008328 date "2016-06-01" @default.
- W2305008328 modified "2023-10-16" @default.
- W2305008328 title "Half-Corbino short-channel amorphous In–Ga–Zn–O thin-film transistors with a-SiOx or a-SiOx/a-SiNx passivation layers" @default.
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- W2305008328 doi "https://doi.org/10.1016/j.sse.2016.03.003" @default.
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