Theoretical analysis and optimization of high-k dielectric layers for designing high-performance and low-power-dissipation nanoscale double-gate MOSFETs

Thriveni, G.; Ghosh, Kaustab

doi:10.1007/s10825-019-01353-z

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…Further development of low power biosensors requires a thorough investigation on various computational models used to minimize power without compromising on performance. Towards this end, Thriveni et al and Damodaran et al provided a detailed description and modelling of various types of leakage and power dissipation in a MOSFET and quantum dot-based modulation doped field effect transistor (MODFET), respectively [ 103 , 104 , 105 ]. The findings exhibited the need for a high k dielectric layer with larger conduction band offset (CBO) or a high band gap semiconductor layer for reducing leakage and minimizing power consumption.…”

Section: Challenges In Current Leakage Power Dissipation and Proposed...mentioning

confidence: 99%

Advancement and Challenges of Biosensing Using Field Effect Transistors

Thriveni

Ghosh

2022

Biosensors

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Field-effect transistors (FETs) have become eminent electronic devices for biosensing applications owing to their high sensitivity, faster response and availability of advanced fabrication techniques for their production. The device physics of this sensor is now well understood due to the emergence of several numerical modelling and simulation papers over the years. The pace of advancement along with the knowhow of theoretical concepts proved to be highly effective in detecting deadly pathogens, especially the SARS-CoV-2 spike protein of the coronavirus with the onset of the (coronavirus disease of 2019) COVID-19 pandemic. However, the advancement in the sensing system is also accompanied by various hurdles that degrade the performance. In this review, we have explored all these challenges and how these are tackled with innovative approaches, techniques and device modifications that have also raised the detection sensitivity and specificity. The functional materials of the device are also structurally modified towards improving the surface area and minimizing power dissipation for developing miniaturized microarrays applicable in ultra large scale integration (ULSI) technology. Several theoretical models and simulations have also been carried out in this domain which have given a deeper insight on the electron transport mechanism in these devices and provided the direction for optimizing performance.

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Section: Challenges In Current Leakage Power Dissipation and Proposed...mentioning

confidence: 99%

Advancement and Challenges of Biosensing Using Field Effect Transistors

Thriveni

Ghosh

2022

Biosensors

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“…The ndings of this study are correlated with various theories and experiments which have given strong credence to our assertions. The study has also taken into account in minimizing power dissipation as the device simulation is carried out with smaller applied bias from 0 to 1 voltage range [25].…”

Section: Introductionmentioning

confidence: 99%

Effect of molecular functionalization in carbon nanotube and graphene nanoribbon based atomic scale sensors

Bhat

Neeharika

Ghosh

2023

Preprint

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Advancement in fabrication technologies has led to the possibility for synthesizing atomic scale structures of graphene nanoribbon (GNR) and carbon nanotube (CNT). The purpose of this paper is to model the electronic property and electrical characteristics of these structures by atomistic modelling using non-equilibrium Green’s function (NEGF) and compare the effect of molecular functionalization and sensing. Within drain to source bias voltage of 1 Volts, armchair configuration based GNR (AGNR) is not found to be sensitive to functionalized molecule with lesser alteration in the density of states (DoS) and transmission spectra. Rolling of the AGNR into armchair CNT (ACNT) makes the performance worse and more insensitive. However, changing the configuration of GNR from armchair to zigzag shows remarkable alteration in the DoS and transmission spectra and significant improvement in sensitivity. This improves further on rolling the zigzag GNR (ZGNR) to zigzag CNT (ZCNT). However, this variation in sensitivity is found to fall with increase in width to length (W/L) ratio of the nanostructures. This specifies the importance of smaller atomic structures and the work provides a guideline for effectively utilization these structures for bio and chemosensing.

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