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- W2948915325 abstract "Novel TaO x encapsulation was presented to enhance the field-effect mobility (μFE) of ZnON thin-film transistors (TFTs) consisting of a metallic Ta film deposited onto the ZnON surface followed by a modest annealing process. The resulting TaO x/ZnON film stack exhibited a more uniform distribution of nanoscale ZnON crystallites with increased stoichiometric anion lattices compared to the control ZnON film. The control ZnON TFTs exhibited a reasonable μFE, subthreshold gate swing (SS), and ION/OFF ratio of 36.2 cm2/V·s, 0.28 V/decade, and 2.9 × 108, respectively. A significantly enhanced μFE value of 89.4 cm2/V·s was achieved for ZnON TFTs with a TaO x encapsulation layer, whereas the SS of 0.33 V/decade and ION/OFF ratio of 8.6 × 108 were comparable to those of the control device. This improvement could be explained by scavenging and passivation effects of the TaO x film on the ZnON channel layer. Density of states (DOS)-based modeling and simulation were performed to obtain greater insight with regard to increasing the performance of the ZnON TFTs with a TaO x encapsulation layer. A smaller number of subgap states near the conduction band (CB) minimum and a higher net carrier density for the TaO x-capped device increased the Fermi energy level toward the CB edge under thermal equilibrium conditions, leading to efficient band conduction and fast carrier transport under the on-state condition." @default.
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- W2948915325 date "2019-06-02" @default.
- W2948915325 modified "2023-10-14" @default.
- W2948915325 title "Boosting Carrier Mobility in Zinc Oxynitride Thin-Film Transistors via Tantalum Oxide Encapsulation" @default.
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- W2948915325 doi "https://doi.org/10.1021/acsami.9b03865" @default.
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