Organic Thin-Film Transistors: Part II—Parameter Extraction

A parameter extraction methodology and a verification of a generic analytical model and a thin-film transistor (TFT) compact dc model for the current-voltage characteristics of organic TFTs are presented. The verification shows that the proposed models meet the requirements for compact modeling and for computer circuit simulators. The models are fully symmetrical, and the TFT compact dc model is validated in all regimes of operation-linear and saturation above threshold, subthreshold, and reverse biasing. Suitable characterization techniques for parameter extraction of mobility, threshold voltage, and contact resistance are provided. Approaches are elaborated for the essential practical feature of upgradability and reducibility of the TFT compact dc model, allowing for easier implementation and modification, as well as separation of characterization techniques.

[1]  Jerzy Kanicki,et al.  Field-Effect Mobility of Organic Polymer Thin-Film Transistors , 2004 .

[2]  Michael S. Shur,et al.  Physics of amorphous silicon based alloy field‐effect transistors , 1984 .

[3]  S. Holdcroft,et al.  Electrical characteristics and photolytic tuning of poly(3-hexylthiophene) thin film metal–insulator–semiconductor field-effect transistors (MISFETs) , 1992 .

[4]  U. Zschieschang,et al.  Organic Thin-Film Transistors: Part I—Compact DC Modeling , 2009, IEEE Transactions on Electron Devices.

[5]  Kazuo Takimiya,et al.  Facile Synthesis of Highly π-Extended Heteroarenes, Dinaphtho[2,3-b:2‘,3‘-f]chalcogenopheno[3,2-b]chalcogenophenes, and Their Application to Field-Effect Transistors , 2007 .

[6]  Ute Zschieschang,et al.  Low-voltage organic thin-film transistors with large transconductance , 2007 .

[7]  Antonio Cerdeira,et al.  Accurate modeling and parameter extraction method for organic TFTs , 2005 .

[8]  M. Jamal Deen,et al.  Contact effects and extraction of intrinsic parameters in poly(3-alkylthiophene) thin film field-effect transistors , 2008 .

[9]  F. J. Garcia Sanchez,et al.  New procedure for the extraction of basic a-Si:H TFT model parameters in the linear and saturation regions , 2001 .

[10]  Y. Tsividis.  Operation and modeling of the MOS transistor , 1987 .

[11]  M. Jamal Deen,et al.  Photosensitive Polymer Thin-Film FETs Based on Poly(3-octylthiophene) , 2005, Proceedings of the IEEE.

[12]  Christian Enz,et al.  MOS transistor modeling for low-voltage and low-power analog IC design , 1997 .

[13]  M. J. Deen,et al.  Model for the injection of charge through the contacts of organic transistors , 2009 .

[14]  D. Natelson,et al.  Nonlinear charge injection in organic field-effect transistors , 2005 .