Abstract
In this work, annealing effects on the characteristics of bismuth-doped indium zinc oxide (IZBO) thin films and the electrical properties of IZBO thin-film transistors (TFTs) were investigated. The X-ray diffraction results reveal that all the IZBO thin films have an amorphous structure regardless of different annealing temperatures. In addition, all the a-IZBO thin films exhibit high transmittance in the visible light region. It is found that the annealing temperature has strong influences on the performances of a-IZBO TFTs. The devices annealed at 400 °C exhibit optimum performances with a field effect mobility of 25.4 cm2 V−1 s−1, a subthreshold swing of 0.22 V decade−1, a threshold voltage of −1.4 V and an on-to-off current ratio of 4.3 × 107. Stability of the devices under positive bias stress and negative bias stress were studied as well.
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Acknowledgments
This work was supported by the Science and Technology Commission of Shanghai Municipality (Grant No. 16JC1400603) and the National Natural Science Foundation of China (Grant No. 61471126).
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Lin, D., Zheng, X., Yang, J. et al. Annealing effects on the performances of Bismuth-doped Indium Zinc Oxide thin-film transistors. J Mater Sci: Mater Electron 30, 12929–12936 (2019). https://doi.org/10.1007/s10854-019-01655-9
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DOI: https://doi.org/10.1007/s10854-019-01655-9