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- W2042305025 abstract "Pinch-off voltage ( V p ) lowering phenomenon in the output characteristics of polycrystalline silicon thin-film transistors (poly-Si TFTs) is reported and investigated by measurement and device simulation. As the trap density increases, the observed V p becomes smaller than the ideal V p while maintaining a linear relationship with the gate–source voltage ( V gs ). The device simulation analysis revealed two mechanisms for V p lowering. One is current saturation due to the increase in onset gate–drain voltage ( V gd ), causing the drain region to become highly resistive, which originates from the gradual increase in surface potential with V gs . This is interpreted as an expansion of the conventional pinch-off concept. The other is the current limitation, controlled by grain boundary (GB) and intragrain conductance at the drain edge, which is peculiar to poly-Si TFTs. On the basis of the above analysis, a GB-conductance-limited carrier transport model is proposed. Its good agreement with the measurements suggests the suitability of this model for describing V p lowering." @default.
- W2042305025 created "2016-06-24" @default.
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- W2042305025 date "2011-01-01" @default.
- W2042305025 modified "2023-09-26" @default.
- W2042305025 title "Pinch-Off Voltage Lowering in Polycrystalline Silicon Thin-Film Transistors" @default.
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- W2042305025 doi "https://doi.org/10.1143/jjap.50.014301" @default.
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