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Characterization and modeling of static properties and low-frequency noise in organic field-effect transistors (OFETs)

Abstract : Organic transistors recently attract much attention because of their unique advantages over the conventional inorganic counterparts. However, the understanding of their operating mechanism and the carrier transport process are still very limited, this thesis is devoted to such a subject. Chapter 1 presents the organic semiconductors regarding carrier transport, parameters, typically applied materials. Chapter 2 describes the issues related to organic transistors: structure, operating mechanism, principal parameters and fabrication technologies. Chapter 3 deals with the static properties characterization. The commonly used methods are firstly presented and then the Y function method is introduced. Afterwards, the characterization methods for principles parameters are separately discussed. The experimental results on our organic transistors are finally described. Chapter 4 focuses on the mod-eling on the basis of the experimental data, regarding DC characteristics modeling with a solution for Poisson's equation, carrier mobility modeling with using Kubo-Greenwood integral as well as a theoretical analysis of OFETs' carrier mobility involving a solution of Poisson's equation. Chapter 5 analyzes the low-frequency noise in organic transistors. One firstly addresses the channel noise sources and then concentrates on the contact noise extraction and contact noise sources diagnosis. The noise measurements on other samples are also presented.
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Yong Xu. Characterization and modeling of static properties and low-frequency noise in organic field-effect transistors (OFETs). Micro and nanotechnologies/Microelectronics. Université de Grenoble, 2011. English. ⟨NNT : 2011GRENT086⟩. ⟨tel-00747417⟩

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