Carbohydrate-attached fullerene derivative for selective localization in ordered carbohydrate-block-poly(3-hexylthiophene) nanodomains. (1st March 2021)

• Record Type: Journal Article
• Authors: Sakai-Otsuka, Yoko; Ogawa, Yu; Satoh, Toshifumi; Chen, Wen-Chang; Borsali, Redouane
• Is Part Of: Carbohydrate polymers. Volume 255(2021)
• Publication Date: 2021-03-01
• Subjects: Carbohydrate-based semiconducting block copolymers -- Self-assembly -- Nanostructured bulk heterojunction -- Fullerene derivative -- Organic photovoltaics; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.117528
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: 10 μm Thick films made from Carbohydrate- b -semi-conducting Block Copolymer System. A carbohydrate-attached fullerene for photovoltaic applications. Fullerene derivatives were selectively localized in the phase-separated nanodomains. A well-defined sub-10 nm scale donor/acceptor lamellar structure was achieved. Abstract: A carbohydrate-based fullerene derivative (AcMal7 -C61 ) is designed, synthesized and applied to a lamellar-forming high- χ block copolymer system, poly(3-hexylthiophene)- block -peracetylated maltoheptaose (P3HT- b -AcMal7 ), to actualize an ordered donor/acceptor (D/A) network. A well-defined D/A lamellar structure of the P3HT- b -AcMal7 :AcMal7 -C61 blend with sub-10 nm domain features is achieved upon thermal annealing. The AcMal7 -C61 molecules are localized in the phase-separated AcMal7 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 -AcMal7 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.