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The effect of Ga content on In _(2x)Ga _(22x)O _3 nanowire transistor characteristics

机译:Ga含量对In _(2x)Ga _(22x)O _3纳米线晶体管特性的影响

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We have investigated the change in structural and electrical properties of In _(2x)Ga _(22x)O _3 nanowires (x=1, 0.69 and 0.32) grown with varied indium (In) and gallium (Ga) contents. The as-grown In _(2x)Ga _(22x)O _3 nanowires kept the cubic crystal structure of In _2O _3 intact even when the atomic percentages of Ga were increased to 31% (x=0.69) and 68% (x=0.32) in comparison to the total amount of In and Ga. However, as Ga added to In _2O _3 structure was substituted with In, the lattice constant decreased and, consequently, the main peaks observed in x-ray diffraction in the direction of (222), (400) and (440) shifted by around 0.08°. The average threshold voltage values for the In _(2x)Ga _(22x)O _3 nanowire transistors were 9.9V (x=1), 6.6V (x=0.67) and 5.6V (x=0.32), exhibiting a more positive shift and the sub-threshold slope increased to 0.53V /dec (x=1), 0.33V /dec (x=0.67) and 0.27V /dec (x=0.32), showing an improved switching characteristic with increasing Ga.
机译:我们研究了In_(2x)Ga _(22x)O _3纳米线(x = 1、0.69和0.32)随铟(In)和镓(Ga)含量的变化而发生的结构和电学性质的变化。即使Ga的原子百分比增加到31%(x = 0.69)和68%(x =),生长的In _(2x)Ga _(22x)O _3纳米线仍保持In _2O _3的立方晶体结构完整。与In和Ga的总量相比为0.32)。但是,由于将In _2O _3结构中添加的Ga替换为In时,晶格常数降低,因此在X射线衍射中观察到的主要峰为( (222),(400)和(440)偏移约0.08°。 In _(2x)Ga _(22x)O _3纳米线晶体管的平均阈值电压值为9.9V(x = 1),6.6V(x = 0.67)和5.6V(x = 0.32),表现出更大的正值偏移和亚阈值斜率分别增加到0.53V / dec(x = 1),0.33V / dec(x = 0.67)和0.27V / dec(x = 0.32),显示出随着Ga的增加而改善的开关特性。

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