Photoinduced Electron Transfer of SWCNT-Based Supramolecular Nanoarchitectures with Photosensitizing Molecules

Abstract

SWCNT-based supramolecular nanoarchitectures constructed by using photosensitizing electron-donors and acceptors to reveal efficient photoinduced charge-separation and their photovoltaic behavior are reviewed. In the presence of light harvesting porphyrins and phthalocyanines, the charge separation process is initiated from the electron transfer from photoexcited donor to SWCNT, whereas in the presence of electron accepting fullerenes, electron is captured by the photoexcited fullerenes from SWCNT under the visible light irradiation. Furthermore, in the presence of electron mediators such as alkyl viologen dication, these SWCNT-molecular nanohybrids undergo photocatalytic reaction. The band-gap dependent charge-separation efficiencies are demonstrated by utilizing the size-selective semiconducting SWCNTs in the photovoltaic cells.