Luscombe, Christine K.Zeng, Cheng2019-05-022019-05-022019Zeng_washington_0250O_19699.pdfhttp://hdl.handle.net/1773/43711Thesis (Master's)--University of Washington, 2019Field effect transistors, one of the most popular electronic devices, have drawn much attention due to their wide application in integrated circuits. Compared to the inorganic silicon-based FETs, organic field effect transistors (OFETs) have the advantage of being flexible and low-cost. As a result of this, OFETs have been extensively studied to improve their performance, including threshold voltage, on/off ratio and mobility. In this thesis, the first two chapters introduce semiconductor materials and devices. In Chapter 3, our work, the synthesis and fabrication of N-type OFETs is demonstrated. In our study, C-H activation, a cheap, green and environment-friendly method is used to make caffeine derivatives. Furthermore, two different alkyl substituents have been introduced to the caffeine unit to compare their performances in OFETs.application/pdfen-USnonecaffeine derivativesC-H activationOFETorganic semiconductorsMaterials ScienceChemistryMaterials science and engineeringThesis