| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 103 === This study focused on developing novel low-bandgap organic materials by the Stille polycondensation of an electron-rich monomer, benzo[1,2-b:4,5-b']dithiophene (BDT), with an electron-deficient monomer, thieno[3,4-c]pyrroledione (TPD), benzo[c]-1,2,5-thiadiazole (BT), dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2-c][1,2,5]thiadiazole (DTBT) or benzo[c]cinnoline (BC), with or without two thiophene rings as a conjugated spacer in the backbone, producing six conjugated polymers, namely NAP01~06, in which two 2,3-didecylthiophene moieties were bonded to the BDT unit to increase their solubility as well as molecular weight. Both intermediates and final products were structurally characterized by NMR spectroscopy (1H NMR, 13C NMR) and mass spectrometry. Gel permeation chromatography (GPC), X-ray diffraction (XRD) and ultraviolet–visible spectrometer (UV/Vis) were applied to determine these polymers’ molecular weight characteristics, crystallinity and optical properties, respectively. Moreover, their electronic properties were then investigated by cyclic voltammetry (CV) and photoelectron spectroscopy in air (PESA).
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