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- W1979972912 abstract "ZnO-based thin film transistors (ZnO-TFTs) were fabricated by sputtering of ZnO on 200 nm SiO 2 on p+-Si substrates. Forming gas annealing (FGA) was carried out directly after deposition at 400°C, 450°C, and 500°C for 1h. TFTs annealed at 400°C exhibited a high threshold voltage (V Th ) of 11 V while those annealed at 500°C showed a low V Th of −3 V. Saturation mobility (μ sat ) increased slightly with temperature to about 1 cm2/Vs. The effect of FGA at 450°C was also compared to oxygen (O 2 ) annealing at the same temperature and it was observed that V Th was higher and saturation mobility was lower after oxygen annealing. It is concluded that an improvement of electrical properties with forming gas annealing is due to incorporation of hydrogen in the active ZnO layer. Hydrogen at oxygen vacancy sites bonds to four Zn atoms (i.e., H forms a multicenter bond) and acts as a shallow donor in ZnO." @default.
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- W1979972912 date "2010-11-01" @default.
- W1979972912 modified "2023-09-28" @default.
- W1979972912 title "Impact of forming gas annealing on ZnO-TFTs" @default.
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- W1979972912 doi "https://doi.org/10.1109/icsict.2010.5667483" @default.
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