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• W2107646987 abstract "Regioregular poly(3-alkylthiophene)s are promising candidates for plastic electronics. In particular, poly(3-hexylthiophene) (P3HT) has attracted considerable interest due to its excellent field effect mobility. However, not muchattention has been given to poly(3-alkylthiophene)s with longer alkyl side chains, mainly because a few studies reportedthat longer side chain length was detrimental to field effect mobility. However, these past studies used untreated SiO 2 asthe gate dielectric and commercially available polymers synthesized by the Rieke method. Here, all polymers testedwere synthesized in house using our quasi-living GRIM method to yield well-defined clean polymers. For our first study,we synthesized P3HT and regioregular poly(3-octylthiohene) (P3OT), both with a high molecular weight (Mn of 40kDaand 35kDa, respectively). Regioregular P3HT required some sonication to dissolve in chloroform, whereas P3OTdissolved readily in chloroform at room temperature. Hole mobility was measured using bottom-contact geometry, withSiO 2 as gate dielectric. The SiO 2 surface was either untreated, or chemically treated with octyltrichlorosilane. Averagemobility on untreated SiO 2 was 0.09 cm 2 /Vs for P3HT and 0.03 cm 2 /Vs for P3OT. Average mobility on OTS-8 treatedSiO 2 , on the other hand, was 0.13 cm 2 /Vs for P3HT and 0.19 cm 2 /Vs for P3OT. The OTS-8 treatment thereforedramatically improved the mobility of P3OT. Both polymers had a maximum mobility of about 0.2 cm 2 /Vs for channellengths ≥10 μm, and a mobility of 0.22 cm 2 /Vs was obtained several times for P3OT. To our knowledge, this is by farthe highest mobility reported for P3OT." @default.
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• W2107646987 date "2007-09-13" @default.
• W2107646987 modified "2023-10-16" @default.
• W2107646987 title "Record high mobilities for regioregular poly(3-octylthiophene)" @default.
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• W2107646987 doi "https://doi.org/10.1117/12.735695" @default.
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