Improvements of Electrical Characteristics in Poly-Si Nanowires Thin-Film Transistors with External Connection of a BiFeO3 Capacitor
Open Access
- 30 September 2021
- Vol. 11 (10) , 758
Abstract
By a sol–gel method, a BiFeO3 (BFO) capacitor is fabricated and connected with the control thin film transistor (TFT). Compared with a control thin-film transistor, the proposed BFO TFT achieves 56% drive current enhancement and 7–28% subthreshold swing (SS) reduction. Moreover, the effect of the proposed BiFeO3 capacitor on IDS-VGS hysteresis in the BFO TFT is 0.1–0.2 V. Because dVint/dVGS > 1 is obtained at a wide range of VGS, it reveals that the incomplete dipole flipping is a major mechanism to obtain improved SS and a small hysteresis effect in the BFO TFT. Experimental results indicate that sol-gel BFO TFT is a potential candidate for digital application.Keywords
Funding Information
- the Ministry of Science and Technology of Taiwan (MOST.108-2221-E-035 -040)
This publication has 18 references indexed in Scilit:
- Negative Capacitance Field Effect Transistor With Hysteresis-Free Sub-60-mV/Decade SwitchingIEEE Electron Device Letters, 2016
- Negative Capacitance in Short-Channel FinFETs Externally Connected to an Epitaxial Ferroelectric CapacitorIEEE Electron Device Letters, 2015
- Sol–gel synthesis of Nd-doped BiFeO3 multiferroic and its characterizationCeramics International, 2015
- Sub-kT/q Switching in Strong Inversion in PbZr0.52Ti0.48O3 Gated Negative Capacitance FETsIEEE Journal on Exploratory Solid-State Computational Devices and Circuits, 2015
- Steep Slope and Near Non-Hysteresis of FETs With Antiferroelectric-Like HfZrO for Low-Power ElectronicsIEEE Electron Device Letters, 2015
- Low-Voltage Steep Turn-On pMOSFET Using Ferroelectric High-$\kappa$ Gate DielectricIEEE Electron Device Letters, 2014
- Direct Observation of Continuous Electric Dipole Rotation in Flux-Closure Domains in Ferroelectric Pb(Zr,Ti)O 3Science, 2011
- Unusual Polarization Patterns in Flat Epitaxial Ferroelectric NanoparticlesPhysical Review Letters, 2008
- Surface chemical bonding states and ferroelectricity of Ce-doped BiFeO3 thin films prepared by sol–gel processJournal of Sol-Gel Science and Technology, 2008
- Use of Negative Capacitance to Provide Voltage Amplification for Low Power Nanoscale DevicesNano Letters, 2007