Synthesis And Characterization Of A Soluble Pentacene Precursor For Organic Thin-Film Transistor

• Main Authors: Ta-Chung Chiang, 蔣達中
• Other Authors: Chia-Hsing Sun
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/08265984382895993585

碩士 === 東吳大學 === 化學系 === 99 === In this research, we design and synthesize a novel soluble organic thin-film transistor, tetrafluoropentacene. For increase solubility, we synthesize a carbon monoxide adduct of tetrafluoropentacene, which was developed by our laboratory, and then organic thin-film transistors device was fabricated by solution process. tetrafluoropentacene can be regenerated in quantitative yield by either thermal or photoinduced elimination of carbon monoxide.Therefore we can substitute vacuum evaporation to reduce cost for fabricating device. We synthesize tetrafluoroanthracquinone with 3,4,5,6-tetrafluorophthalic anhydride and 1,4-dihydroxybenzene, and then perform Diels-Alder reaction with benzofulvene to synthesize the intermediate for tetrafluoropentacene. After reduction, aromatization, and ozonolysis reaction, we can get the precursor of tetrafluoropentacene with the total yield of 20%。 From TGA measurement we know that , thetetrafluoropentacene can be regenerated at 120℃. determine its characteristic by measuring NMR、Mass、FTIR, and also compare difference of HOMO and LUMO energy level between tetrafluoropentacene and its derivative by CV and theory calculation. We fabricate top-contact thin-film and microcrystal device by solution process with gold electrode, Si wafer without surface treatment, and then measure its P-type and N-type mobility. Even though we didn’t get good mobility in the organic thin-film method, but we got the mobility of 1.9x10-3 cm2/Vs from microcrystal device; therefore, it is proved that tetrafluoropenacene is a material of organic transistors.