Abstract
The new organic semiconducting material, triethylsilylethynyl anthradithiophene with bithiophene end groups, was designed and synthesized by Suzuki coupling reaction for the application of the OTFT. The synthesized oligomer was characterized by TGA and DSC for thermal stability, by UV-vis absorption for optical property, and by CV for electrochemical property. ((2,8-Di([2,2'-bithiophen]-5-yl)-11-((diethyl (methyl)silyl)ethynyl)anthra [2,3-b:6,7-b'] dithiophen-5-yl)ethynyl) triethylsilane showed typical p-channel activity with hole carrier mobility of 0.00005 cm2/Vs, the threshold voltage of −1.6 V, and the on/off ratio of 1.0x103. In order to study of morphology and crystallinity of ((2,8-di([2,2'-bithiophen]-5-yl)-11-((diethyl(methyl)silyl)ethynyl) anthra [2,3-b:6,7-b'] dithiophen-5-yl)ethynyl) triethyl silane, AFM and XRD was analyzed.
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