| Summary: | 碩士 === 國立暨南國際大學 === 應用化學系 === 98 === There are mainly p-type materials in developments of organic field effect transistors (OFETs) and very limited for n-type materials. In order to fabricate complementary circuits and enhance the applicability of organic semiconductor materials for flexible electronics, it is both essential and provided with potential to explore soluble n-type even ambipolar materials. In this thesis, we employed theoretical calculation to study TcTH (Tetraceno[2,3-c]thienophene)-based organic semiconductors. We utilized these calculated ionization potentials (IPs), electronic affinities (EAs) and internal reorganization energies (λ±) to figure out whether these derivatives are cabable of transporting electrons or holes. Otherwise, we substitute molecules with Triisopropylsilanyl-ethynyl (TIPS) group to increase solubility for the sake of solution-processable organic semiconductor materials. It reveals that there is smaller hole reorganization energy of TcTH (about 66 m eV) than other analogies due to more non-bonding character. For TcTH-based molecules in this study, most of them possess possibilities of transporting holes (meaning p-type materials) and there is no lack of n-type and ambipolar molecules on the screening criteria of ionization potentials and electronic affinities. Among studied molecules, TIPS-DCN-TcTH and TIPS-TCN-TcTH are not only with soluble TIPS group and balanced reorganization energies for holes and electrons, but also ionization potentials and electronic affinities both reach requisites being p-type and n-type materials. We therefore anticipate these two molecules got a lot of potentials being solution-fabricated air-stable ambipolar devices.
|
|---|
