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A device model for amorphous In–Ga–Zn–O thin-film transistors (a-IGZO TFTs) that explains temperature dependence is proposed. It incorporates a carrier-density dependent mobility and a density of subgap traps of a-IGZO. The model parameters were extracted from only one transfer curve of an a-IGZO TFT at a low drain voltage through a simple analytical model. Device simulation based on this model reproduced...
An operation model for an amorphous In–Ga–Zn–O (a-IGZO) based thin film transistor (TFT) is studied. The model is not based on the exponential tail states employed in hydrogenated amorphous Si (a-Si:H) TFT, but on a power function of the carrier density which is observed in the TFT and Hall mobilities of a-IGZO. A 2D numerical simulator employing this model reproduced current–voltage characteristics...
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