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Electron irradiation effect on the Schottky gate of ZnO nanowires-based field effect transistors

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5 Author(s)
Qi Zhang ; State Key Lab. for Adv. Metals & Mater., Univ. of Sci. & Technol. Beijing, Beijing, China ; Junjie Qi ; Yunhua Huang ; Xin Li
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The authors investigated the performance of ZnO nanowire-based metal-semiconductor field effect transistors (MESFETs) by focusing electron beam on the Schottky gate. The MESFET was fabricated by employing Tantalum as drain and source and by using Schottky barrier at tungsten-ZnO interface as the gate. As to IDS against VGS curves, once the gate was illuminated with electron beam radiation, crests with a redshift as VDS increased and a p-type semiconductor transistor behaviour were observed. At the critical points, the value of VDS-VGS revealed a linear behaviour with the increasing VDS. The authors attributed these results to the gain enhanced by electron beam radiation and carrier-trapping process, while the shift may be associated with the image-force lowing effect.

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Micro & Nano Letters, IET  (Volume:6 ,  Issue: 6 )