title: Enhanced electron collection efficiency in dye-sensitized solar cells based on nanostructured TiO(2) hollow fibers.
abstract: Nanostructured TiO(2) hollow fibers have been prepared using natural cellulose fibers as a template. This cheap and easily processed material was used to produce highly porous photoanodes incorporated in dye-sensitized solar cells and exhibited remarkably enhanced electron transport properties compared to mesoscopic films made of spherical nanoparticles. Photoinjected electron lifetime, in particular, was multiplied by 3-4 in the fiber morphology, while the electron transport rate within the fibrous photoanaode was doubled. A nearly quantitative absorbed photon-to-electrical current conversion yield exceeding 95% was achieved upon excitation at 550 nm and a photovoltaic power conversion efficiency of 7.2% reached under simulated AM 1.5 (100 mW cm(-2)) solar illumination.
authors.affiliation: Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Ghadiri
authors.forename: Nima
authors.initials: N
authors.lastname: Taghavinia
authors.forename: Shaik M
authors.initials: SM
authors.lastname: Zakeeruddin
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel
authors.forename: Jacques-E
authors.initials: JE
authors.lastname: Moser
mesh_terms: D004396:Coloring Agents / Q000737:chemistry* / Q000528:radiation effects; D003460:Crystallization / Q000379:methods; D011211:Electric Power Supplies; D004579:Electron Transport; D004867:Equipment Design; D019544:Equipment Failure Analysis; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D012993:Solar Energy; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D046911:Macromolecular Substances; C009495:titanium dioxide; D014025:Titanium