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<p>This paper presents design, simulation and analysis of Dual cavity dielectrically modulated extended gate heterostructure TFET (DC DM EG HTFET). The main objective of this biosensor is to detect the label-free biological molecules like Gluten (K = 5), Zenin (K = 7), Keratin (K = 10) and Gelatin (K = 12) which are placed in nanocavity. For enhancing the sensitivity in the biosensor the extended gate is crucial, without extended gate that has limited electrostatic power over the tunneling process. So, for the first time DC DM EG HTFET is proposed with an extended gate and the biosensor has dual cavities which are separated by HfO<sub>2</sub> to enhance the overall performance and also the source end is doped with InGaAs (Indium Gallium Arsenide). The DC DM EG HTFET is a novel device with significantly improved performance. With its ability to create a sharp subthreshold slope (less than 60 mV/decade), enhance electrostatic control, decrease short-channel effects and boost on-state current this structure is an excellent choice for sensitive, high-performance, low-power applications with impressive efficiency. The sensitivity of DC DM EG HTFET analyzed with parameters like drain current, threshold voltage, I<sub>on</sub>/I<sub>off</sub> ratio, sub-threshold swing. The sensitivity of the biosensor are analyzed for both neutral and charged bio-molecules with different dielectric constants. This biosensor shows higher sensitivity values with threshold voltage (V<sub>th</sub>) of 1.427&#xa0;V, drain current (I<sub>on</sub>) of 0.356&#xa0;mA/µm and Subthreshold swing (SS) of 23.75 mV/decade and maximum sensitivity of 2.41 × 10<sup>09</sup> is observed. The DC DM EG HTFET is compared with existing biosensors and presents higher drain current, trans-conductance and sensitivity, this enhances the chances of producing high sensitive bio-senor with low-cost and minimal fabrication process. These biomolecules are used in different applications like keratin is used for cosmetics like conditioners and treatment of hair and gelatin is used in foods and pharmaceuticals for production of capsules for vitamins and medications.</p>

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Design and Analysis of Dual Cavity Dielectrically Modulated Extended Gate Heterostructure Tunnel FET for Bio-Molecules Detection

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • I. Rama Satya Nageswara Rao,
  • Srinivasa Rao Karumuri

摘要

This paper presents design, simulation and analysis of Dual cavity dielectrically modulated extended gate heterostructure TFET (DC DM EG HTFET). The main objective of this biosensor is to detect the label-free biological molecules like Gluten (K = 5), Zenin (K = 7), Keratin (K = 10) and Gelatin (K = 12) which are placed in nanocavity. For enhancing the sensitivity in the biosensor the extended gate is crucial, without extended gate that has limited electrostatic power over the tunneling process. So, for the first time DC DM EG HTFET is proposed with an extended gate and the biosensor has dual cavities which are separated by HfO2 to enhance the overall performance and also the source end is doped with InGaAs (Indium Gallium Arsenide). The DC DM EG HTFET is a novel device with significantly improved performance. With its ability to create a sharp subthreshold slope (less than 60 mV/decade), enhance electrostatic control, decrease short-channel effects and boost on-state current this structure is an excellent choice for sensitive, high-performance, low-power applications with impressive efficiency. The sensitivity of DC DM EG HTFET analyzed with parameters like drain current, threshold voltage, Ion/Ioff ratio, sub-threshold swing. The sensitivity of the biosensor are analyzed for both neutral and charged bio-molecules with different dielectric constants. This biosensor shows higher sensitivity values with threshold voltage (Vth) of 1.427 V, drain current (Ion) of 0.356 mA/µm and Subthreshold swing (SS) of 23.75 mV/decade and maximum sensitivity of 2.41 × 1009 is observed. The DC DM EG HTFET is compared with existing biosensors and presents higher drain current, trans-conductance and sensitivity, this enhances the chances of producing high sensitive bio-senor with low-cost and minimal fabrication process. These biomolecules are used in different applications like keratin is used for cosmetics like conditioners and treatment of hair and gelatin is used in foods and pharmaceuticals for production of capsules for vitamins and medications.