Photodoping and enhanced visible light absorption in single-walled carbon nanotubes functionalized with a wide band gap oligomer

Abstract

Carbon nanotubes feature excellent electronic properties but narrow absorption bands limit their utility in certain optoelectronic devices, including photovoltaic cells. Here, the addition of a wide-bandgap gap oligomer enhances light absorption in the visible spectrum. Furthermore, the oligomer interacts with the carbon nanotube through a peculiar charge transfer, which provides insight into Type II heterojunctions.

Keywords: carbon nanotubes; charge transfer complex; field effect transistor; photocurrent; photodoping.