To provide a highly efficient device, this article presents a vertical GaSb tunnel field effect transistor (Hetero-VTFET) both with and without a source pocket in order to achieve the maximum level of performance. This is the first time that a group IV miscible alloy, GaSb, has been used in the source to improve carrier tunneling in a heterojunction of a source (GaSb) and channel (Si). Due to low band gap of GaSb material in source region the carrier tunnelling is high at source channel interface. A heterojunction structure and work function engineering are used to establish an optimal Hetero-Vertical TFET design. In order to analyze the behavior of hetero-Vertical TFETs developed, TCAD Silvaco simulation results are used. In accordance with the proposed optimal structure, the ratio of ION to IOFF(>1014) is higher, the subthreshold swing is shorter (25 mV/Dec), and the ION current is in the range of 10-5 A/m.
Design and Analysis of a GaSb Heterojuncton Vertical TFET with Source Pocket for Work Function Engineering and Improved Analog Performance
Wadhwa G.
Primo
;Proto A.Ultimo
2024
Abstract
To provide a highly efficient device, this article presents a vertical GaSb tunnel field effect transistor (Hetero-VTFET) both with and without a source pocket in order to achieve the maximum level of performance. This is the first time that a group IV miscible alloy, GaSb, has been used in the source to improve carrier tunneling in a heterojunction of a source (GaSb) and channel (Si). Due to low band gap of GaSb material in source region the carrier tunnelling is high at source channel interface. A heterojunction structure and work function engineering are used to establish an optimal Hetero-Vertical TFET design. In order to analyze the behavior of hetero-Vertical TFETs developed, TCAD Silvaco simulation results are used. In accordance with the proposed optimal structure, the ratio of ION to IOFF(>1014) is higher, the subthreshold swing is shorter (25 mV/Dec), and the ION current is in the range of 10-5 A/m.File | Dimensione | Formato | |
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Design and Analysis of a GaSb Heterojuncton Vertical TFET with Source Pocket for Work Function Engineering and Improved Analog Performance.pdf
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