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Energies
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Energies
Article . 2025
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Performance Improvement of Vertical Channel Indium–Gallium–Zinc Oxide Thin-Film Transistors Using Porous MXene Electrode

Authors: Wanqiang Fu; Qizhen Chen; Peng Gao; Linqin Jiang; Yu Qiu; Dong-Sing Wuu; Ray-Hua Horng; +1 Authors

Performance Improvement of Vertical Channel Indium–Gallium–Zinc Oxide Thin-Film Transistors Using Porous MXene Electrode

Abstract

The surface morphology of porous source electrodes plays a significant role in the performance of vertical channel indium–gallium–zinc oxide thin-film transistors (VC-IGZO-TFTs). This study systematically investigates the properties of porous MXene-based source electrodes and their impact on VC-IGZO-TFTs fabricated with varying MXene concentrations. As the MXene concentration increases, both the sheet resistance and porosity of the electrodes decrease. VC-IGZO-TFTs based on a 3.0 mg/mL MXene concentration exhibit optimal electrical performance, with a threshold voltage (Vth) of 0.16 V, a subthreshold swing (SS) of 0.20 V/decade, and an on/off current ratio (Ion/Ioff) of 4.90 × 105. Meanwhile, the VC-IGZO-TFTs exhibit excellent electrical reliability and mechanical stability. This work provides a way to analyze the influence of sheet resistance and porosity on the performance of VC-IGZO-TFTs, offering a viable approach for enhancing device efficiency through porous MXene electrode engineering.

Keywords

Technology, porous source electrode, flexible devices, T, IGZO, vertical channel TFT, MXene

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