期刊
ACS NANO
卷 6, 期 12, 页码 10924-10929出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn3043836
关键词
poly(3-hexyl thiophene) (P3HT); perylene tetracaboxydiimide; donor/acceptor; shish-kebab cystals; coupled crystallization; heterogeneous nucleation
类别
资金
- US Department of Energy, Basic Energy Sciences [DE-SC0006639]
- PHaSE EFRC [DE-SC0001087]
- National Science Foundation MRSEC at UMass [DMR-0820506]
- U.S. Department of Energy (DOE) [DE-SC0006639] Funding Source: U.S. Department of Energy (DOE)
Self-assembled crystalline organic nanostructures containing electron donor and acceptor materials hold promise as building blocks for photovoltaic devices. We show that coupled crystallization of poly(3-hexyl thiophene) (P3HT) and perylene tetracarboxydiimide (PDI) induced by solvent evaporation, wherein both components modify crystallization of the other, gives rise to donor/acceptor shish-kebabs with tunable nanostructures. P3HT kinetically stabilizes supersaturated solutions of PDI and modifies the growth of PDI crystals, leading to formation of extended PDI shish nanowires that in turn serve as heterogeneous nucleation sites for fibrillar P3HT kebabs during solvent casting. The dimensions of these nanostructures can be tailored through variations in donor/acceptor ratio or solvent quality, and the method is shown to be general to several other poly(3-alkyl thiophenes) and perylene derivatives, thus providing a simple and robust route to form highly crystalline nanophase separated organic donor/acceptor assemblies.
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