Abstract
This work exclusively illustrates the impact of low-k gate oxide material on the ambipolarity of SOI-DG TFET proposed previously in literature (Goswami and Bhowmick in Silicon, https://doi.org/10.1007/s12633-019-00169-7, 2019) with a comparative AC analysis of the two TFET architectures presented here. Based upon the primary DC characterisation of the proposed device, a thorough analysis of ambipolarity, impact of varying mole fraction, influence of temperature on device characteristics are performed explicitly. For the complete RF characterisation, the transconductance, cut-off frequency, transit time, power delay product, transconductance generation efficiency and parasitic capacitances are presented in detail with a comparative summarization. The reasonably high on-current of the proposed device (orders of mA/μm) with very low leakage current floor (orders of fA/μm) makes the device suitable for low power applications as well as for high fan-out operations. The seemingly low threshold voltage with notably low VDD values (0.3 V) aids to substantial reduction of dynamic power consumption. The high cut off frequency (best reported in tera hertz) of the device opens the window for numerous diversified applications.
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Acknowledgements
This paper is an outcome of the R&D work undertaken in the project under the Visvesvaraya Ph.D Scheme of Ministry of Electronics & Information Technology, Government of India, being implemented by Digital India Corporation (formerly Media Lab Asia). The author offer their heartfelt gratitude to the “Microelectronics laboratory”, Dept. of Electronics and Communication Engineering, NIT Silchar to provide us with the facilities to perform our research work. We also acknowledge Dr. T.R. Lenka, Mr. Ashutosh Srivastava, Mr. Nitu Mani Rajbongshi and Mr. Bhargav Doley for their constant encouragement and motivation during the course of our research work.
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Goswami, P.P., Khosla, R. & Bhowmick, B. RF analysis and temperature characterization of pocket doped L-shaped gate tunnel FET. Appl. Phys. A 125, 733 (2019). https://doi.org/10.1007/s00339-019-3032-8
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DOI: https://doi.org/10.1007/s00339-019-3032-8