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- W2744933018 abstract "Black phosphorus (BP) has emerged as a promising channel material for highly scaled transistors with a high mobility (1000 cm2/Vs), tunable band gap (0.3 eV–2.0 eV), and anisotropic effective mass [1]-[4] at ultra-thin body thicknesses. While devices with high performance in the ON-state have been demonstrated by using Schottky contacts, the subthreshold characteristics have been poor [5],[6]. This is caused by large ambipolar carrier injection from the drain due to the relatively small, direct band gap of BP and a low effective mass. Recently, it has been shown that using electrostatically doped (ES-doped) source and drain contacts can improve the subthreshold characteristics in BP MOSFETs [7], however, the potential advantage of this approach was not well quantified. In this work, we directly compare BP MOSFETs with ES-doped and Schottky contacts, and show greatly improved subthreshold and off-state leakage behavior in ES-doped devices, particularly at high drain bias. Using a one-dimensional transport model, we further show that the advantage of the ES-doped devices is due to the ambipolar current being limited by band-to-band tunneling. Experimentally exploring BTB-tunneling in BP is a first step towards developing BP TFETs." @default.
- W2744933018 created "2017-08-17" @default.
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- W2744933018 date "2017-06-01" @default.
- W2744933018 modified "2023-09-24" @default.
- W2744933018 title "Band-to-band tunneling limited ambipolar current in black phosphorus MOSFETs" @default.
- W2744933018 doi "https://doi.org/10.1109/drc.2017.7999417" @default.
- W2744933018 hasPublicationYear "2017" @default.
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