N-type Organic Field Effect Transistor Based on Caffeine Derivatives
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Field 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.