Method of selective separation of semiconducting carbon nanotubes, dispersion of semiconducting carbon nanotubes, and electronic device including carbon nanotubes separated by using the method

摘要

According to example embodiments, a method includes dispersing carbon nanotubes in a mixed solution containing a solvent, the carbon nanotubes, and a dispersant, the carbon nanotubes including semiconducting carbon nanotubes, the dispersant comprising a polythiophene derivative including a thiophene ring and a hydrocarbon sidechain linked to the thiophene ring. The hydrocarbon sidechain includes an alkyl group containing a carbon number of 7 or greater. The hydrocarbon sidechain may be regioregularly arranged, and the semiconducting carbon nanotubes are selectively separated from the mixed solution. An electronic device includes semiconducting carbon nanotubes and the foregoing described polythiophene derivative.

主权项

1. A method comprising:
dispersing carbon nanotubes in a mixed solution containing a solvent, the carbon nanotubes, and a dispersant,
the carbon nanotubes including semiconducting carbon nanotubes,the dispersant comprising a polythiophene derivative including a thiophene ring and a hydrocarbon sidechain linked to the thiophene ring,the hydrocarbon sidechain including an alkyl group containing a carbon number of 8 or greater, and the hydrocarbon sidechain being regioregularly arranged; selectively separating the semiconducting carbon nanotubes from the mixed solution, wherein the polythiophene derivative includes a structure represented by Formula 1 below: wherein R is the alkyl group and n is an integer greater than 1 and less, than or equal to 40,000, R is a C8 to C50 alkyl group, R1 and R2 are each independently one of hydrogen, halogen, methyl, and halomethyl, and the selectively separating the semiconducting carbon nanotubes from the mixed solution comprises separating a supernatant containing the dispersed semiconducting carbon nanotubes from the mixed solution by centrifugation.