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Enhanced electron collection efficiency in dye-sensitized solar cells based on nanostructured TiO2 hollow fibers

Ghadiri, E ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1021/nl904125q
  3. Publisher: 2010
  4. Abstract:
  5. Nanostructured TiO2 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
  6. Keywords:
  7. Dye-sensitized solar cells ; Interfacial electron transfer dynamics ; Time-resolved diffuse reflectance ; TiO2 nanostructured hollow fibers ; Transient photovoltage and photocurrent ; Charge transport ; Diffuse reflectance ; Hollow fiber ; Photo-voltage ; Time-resolved ; TiO ; Conversion efficiency ; Electron transitions ; Electron transport properties ; Fibers ; Photoelectrochemical cells ; Reflection ; Transport properties ; Solar cells ; Nanomaterial ; Titanium dioxide ; Chemistry ; Conformation ; Equipment ; Instrumentation ; Macromolecule ; Methodology ; Power supply ; Radiation exposure ; Surface property ; Ultrastructure ; Coloring Agents ; Crystallization ; Electric Power Supplies ; Electron Transport ; Equipment Design ; Equipment Failure Analysis ; Macromolecular Substances ; Materials Testing ; Molecular Conformation ; Nanostructures ; Nanotechnology ; Particle Size ; Solar Energy ; Surface Properties ; Titanium
  8. Source: Nano Letters ; Volume 10, Issue 5 , April , 2010 , Pages 1632-1638 ; 15306984 (ISSN)
  9. URL: http://pubs.acs.org/doi/abs/10.1021/nl904125q