Graduate Thesis Or Dissertation
 

Comprehensive depletion-mode modeling of oxide thin-film transistors

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  • The primary focus of this thesis is modifying the comprehensive depletion-mode model and extending its applicability to p-channel thin-film transistor (TFT) behavior and subthreshold (subpinchoff) operation. The comprehensive depletion-mode model accurately describes depletion-mode TFT behavior and establishes a set of equations, different from those obtained from square-law theory, which can be used for carrier mobility extraction. In the modified comprehensive depletion-mode model, interface mobility (mu_interface ) and bulk mobility (mu_bulk ) are distinguished. Simulation results reveal that when square-law theory mobility extraction equations are used to assess depletion-mode TFTs, the estimated interface mobility is often overestimated. In addition, the carrier concentration of a thin channel layer can be estimated from an accurate fitting of measured depletion-mode TFT current-voltage characteristics curves using the comprehensive depletion-mode model.
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file details ZhouFan2014_.pdf 2017-08-16 Público Baixar