| Summary: | 碩士 === 國立臺灣大學 === 高分子科學與工程學研究所 === 107 === P(NDI2OD-T2) was synthesized and blended respectively with non-conjugated polymers including poly(ethylene oxide) (PEO), atactic polypropylene (aPP), and isotactic polypropylene (iPP). It was found that the coherence lengths of the lamellar stacking, π-stacking, and polymer backbone can be regulated by the blending proportion of PEO, aPP, or iPP, resulting in the disparity in the thin-film morphology and the electron mobility. Organic field-effect transistor revealed that PEO40 (0.133 cm2 V-1 s-1) and aPP5 (0.127 cm2 V-1 s-1) exhibited electron mobility analogous to P(NDI2OD-T2) (0.106 cm2 V-1 s-1), stressing that the electron mobility of P(NDI2OD-T2) could be preserved in the presence of specific amount of PEO or aPP. Relationship between the coherence lengths of P(NDI2OD-T2) and the electron mobility is established, elucidating the effect of π-stacking and polymer-backbone aggregates in the charge transportation. The P(NDI2OD-T2) aggregation in the π-stacking seems to have a greater influence on the electron mobility.
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