Multi-scale analysis of radio-frequency performance of 2D-material based field-effect transistors

Toral‐Lopez, Alejandro; Pasadas, Francisco; Marín, Enrique G.; Toral-López, Alejandro; Gonzalez-Medina, J. M.; Ruiz, Francisco G.; Jiménez, David; Godoy, A.

doi:10.1039/d0na00953a

Cited by 4 publications

(4 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In summary, we reported a multiscale approach that advances the state-of-the-art of computational tools for the study of biosensors, and which can be exploited in the design of future sensors, including, for example, the analysis of different 2DMs and oxides along with atomic level particularities of the material 47 or the assessment of the impact of the device geometry on its sensitivity. Moreover, the present study might serve as a basis for further detailed investigations, including the impact on the sensor response non-idealities like charge traps, 48 contact resistances, or defects in graphene.…”

Section: Discussionmentioning

confidence: 99%

Graphene BioFET sensors for SARS-CoV-2 detection: a multiscale simulation approach

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Graphene BioFET sensors for SARS-CoV-2 detection: a multiscale simulation approach

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The electrolyte corresponds to a Phosphate Buffer Saline (PBS) solution, whose regulatory chain of reactions-dependent on ionic strength and temperature-are described in [26], while the ion concentration is determined by the modified Boltzmann equation, including steric effects due to the finite size of the ions. This numerical tool has been previously validated with experimental results at the levels of the semiconductor device [27,28], the sensing interface [29], and the complete BioFET device [26]. DNA is selected as the analyte of interest due to their relevance in numerous biological processes, although this study could be extended to other biomolecules [29].…”

Section: Methodsmentioning

confidence: 99%

Variability Assessment of the Performance of MoS2-Based BioFETs

et al. 2023

Self Cite

View full text Add to dashboard Cite

Two-dimensional material (2DM)-based Field-Effect Transistors (FETs) have been postulated as a solid alternative for biosensing applications thanks to: (i) the possibility to enable chemical sensitivity by functionalization, (ii) an atomically thin active area which guarantees optimal electrostatic coupling between the sensing layer and the electronic active region, and (iii) their compatibility with large scale fabrication techniques. Although 2DM-based BioFETs have demonstrated notable sensing capabilities, other relevant aspects, such as the yield or device-to-device variability, will demand further evaluation in order to move them from lab-to-fab applications. Here, we focus on the latter aspect by analyzing the performance of MoS2-based BioFETs for the detection of DNA molecules. In particular, we explore the impact of the randomized location and activation of the receptor molecules at the sensing interface on the device response. Several sensing interface configurations are implemented, so as to evaluate the sensitivity dependence on device-to-device variability.

show abstract

“…The term includes the fixed charge associated with impurities as well as mobile carriers, i.e., electrons and holes. The time-dependent continuity equation is written as: where is the electric displacement field and the current density along the channel, expressed in terms of the Fermi-level gradient as [ 19 ]: , where is the electron (hole) mobility dependent on the longitudinal electric field [ 20 ], and n ( p ) the electron (hole) carrier densities. The Fermi level is solved using the continuity equation and combined with the conduction and valence band profiles to self-consistently evaluate the surface carrier densities as: where ( ) is the conduction (valence) band DoS, the Fermi–Dirac function, and stands for the Dirac energy determined by the electrostatic potential obtained solving the Poisson equation.…”

Section: Numerical Simulation Scheme and Validationmentioning

confidence: 99%

Reconfigurable frequency multipliers based on graphene field-effect transistors

Toral-Lopez,

Marin,

Pasadas

et al. 2023

Discover Nano

Self Cite

View full text Add to dashboard Cite

Run-time device-level reconfigurability has the potential to boost the performance and functionality of numerous circuits beyond the limits imposed by the integration density. The key ingredient for the implementation of reconfigurable electronics lies in ambipolarity, which is easily accessible in a substantial number of two-dimensional materials, either by contact engineering or architecture device-level design. In this work, we showcase graphene as an optimal solution to implement high-frequency reconfigurable electronics. We propose and analyze a split-gate graphene field-effect transistor, demonstrating its capability to perform as a dynamically tunable frequency multiplier. The study is based on a physically based numerical simulator validated and tested against experiments. The proposed architecture is evaluated in terms of its performance as a tunable frequency multiplier, able to switch between doubler, tripler or quadrupler operation modes. Different material and device parameters are analyzed, and their impact is assessed in terms of the reconfigurable graphene frequency multiplier performance.

show abstract

Multi-scale analysis of radio-frequency performance of 2D-material based field-effect transistors

Abstract: Two-dimensional materials (2DMs) are a promising alternative to complement and upgrade high-frequency electronics. However, in order to boost their adoption, the availability of numerical tools and physically-based models able to...

Cited by 4 publications

References 40 publications

Graphene BioFET sensors for SARS-CoV-2 detection: a multiscale simulation approach

Graphene BioFET sensors for SARS-CoV-2 detection: a multiscale simulation approach

Variability Assessment of the Performance of MoS2-Based BioFETs

Reconfigurable frequency multipliers based on graphene field-effect transistors

Contact Info

Product

Resources

About