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We demonstrated the improvement of electrical performance and stability of solution-deposited amorphous InGaZnO (a-IGZO) thin-film transistors (TFTs) by combined Ar/O2 plasma and microwave irradiation (MWI) treatment at low temperature. After the combined MWI and Ar/O2 plasma treatments, the bonding between metal and oxygen ions was strengthened, and then the solution-deposited a-IGZO film acted as a semiconductor for transistors. In addition, the Ar/O2 plasma treatment promoted the reliability of solution-deposited a-IGZO TFTs owing to the removal of residual carbon, which easily traps electrons. Consequently, the solution-deposited a-IGZO TFT treated with the combination of Ar/O2 plasma and MWI exhibited excellent electrical stability as well as an improved transfer characteristic. Therefore, the combined Ar/O2 plasma and MWI treatment is a feasible post-treatment to realize flexible electronics with solution-deposited metal oxide thin films.
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Hwang et al. (2014) studied this question.
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