Abstract
In this paper, a three-step annealing process was employed to treat IGZO thin-film field-effect transistors (TFTs). We observed that TFTs prepared by an initial high-temperature thermal annealing exhibited a low threshold voltage. By employing a second-step low-temperature annealing, the threshold voltage of the TFT was positively shifted, demonstrating improved turn-off characteristics. However, after this process, a significant decrease in TFT mobility and a change in threshold voltage were observed. By introducing a third 633 nm laser annealing technique, we managed to control the threshold voltage and improve mobility. To investigate the mechanism of the changes in TFT performances up to different post-annealing processes, a series of characterization techniques were employed to explain the TFT performance changes.
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Funding
This work was supported by the National Natural Science Foundation of China (No. 52273242), the National Key R&D Program of China (Nos. 2021YFB2800703, 2021YFB2800701), and the Chinese Academy of Sciences.
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Conceptualization: Fenghua Liu, Hangxing Xie, and Weiping Wu; Methodology: Jiacheng Bao, Yan Liu, and Fenghua Liu; Formal analysis and investigation: Jiacheng Bao, Luying Huang, Yan Liu, Fenghua Liu; Writing—original draft preparation: Jiacheng Bao; Writing—review and editing: Fenghua Liu, Hangxing Xie and Weiping Wu; Funding acquisition: Hangxing Xie and Weiping Wu; Resources: Hangxing Xie and Weiping Wu; and Supervision: Fenghua Liu, Hangxing Xie, and Weiping Wu.
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Bao, J., Huang, L., Liu, Y. et al. Solution-processed IGZO field-effect transistors with a three-step laser annealing process. J Mater Sci: Mater Electron 35, 872 (2024). https://doi.org/10.1007/s10854-024-12633-1
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DOI: https://doi.org/10.1007/s10854-024-12633-1