Article ID Journal Published Year Pages File Type
1596265 Solid State Communications 2008 6 Pages PDF
Abstract

A Photosensitized electrode was fabricated through a novel polymerization of pyrrole initiated by TiO2 nanoparticles under UV irradiation. Conjugated polypyrrole (PPy) continuously grows on the surface of the TiO2 film, resulting in fully covered film with the stably-bound PPy layer. The film structures were analysed using Raman and X-ray photoelectron spectroscopy (XPS). It was found that the film electrode exhibits improved photoresponse including the flat band potential, photocurrent and separation of charges. The lowest unoccupied molecular orbital (LUMO) level of the PPy is higher in energy than the LUMO of PPy in electrodeposited electrodes, providing a stronger driving force for the electron injection into the TiO2.

Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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