A carbohydrate-based fullerene derivative (AcMal-C) is designed, synthesized and applied to a lamellar-forming high-χ block copolymer system, poly(3-hexylthiophene)-block-peracetylated maltoheptaose (P3HT-b-AcMal), to actualize an ordered donor/acceptor (D/A) network. A well-defined D/A lamellar structure of the P3HT-b-AcMal:AcMal-C blend with sub-10 nm domain features is achieved upon thermal annealing. The AcMal-C molecules are localized in the phase-separated AcMal nanodomains without causing the formation of fullerene crystals while maintaining the lamellar morphology up to 1:0.5 (D:A) blending ratio. The cross-sectional TEM observation and GISAXS measurement reveals that the P3HT-b-AcMal tends to spontaneously organize into lamellar structures oriented perpendicular to the film surface at the air/film interface while the domain orientation at the bottom interface depends on the nature of the substrate.
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| http://dx.doi.org/10.1016/j.carbpol.2020.117528 | DOI Listing |
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