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Mesoporous submicrometer TiO 2 hollow spheres as scatterers in dye-sensitized solar cells

Dadgostar, S ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1021/am300329p
  3. Publisher: 2012
  4. Abstract:
  5. Hierarchical submicrometer TiO 2 hollow spheres with outer diameter of 300-700 nm and shell thickness of 200 nm are synthesized by liquid phase deposition of TiO 2 over carbon microspheres as sacrificial templates. The final TiO 2 hollow spheres are applied as a scattering layer on top of a transparent nanocrystalline TiO 2 film, serving as the photoanode of a dye-sensitized solar cell (DSC). In addition to efficient light scattering, the mesoporous structure of TiO 2 hollow spheres provides a high surface area, 74 m 2/g, which allows for higher dye loading. This dual functioning suggests that TiO 2 hollow spheres may be good replacements for conventional TiO 2 spheres as scatterers in DSCs. A high efficiency of 8.3% is achieved with TiO 2 hollow spheres, compared with 6.0% for the electrode with 400 nm spherical TiO 2 scatterers, at identical conditions
  6. Keywords:
  7. Scattering layer ; TiO 2 hollow sphere ; Carbon microspheres ; Dye loading ; Dye-Sensitized solar cell ; Dye-sensitized solar cells ; High surface area ; Hollow sphere ; Identical conditions ; Liquid phase depositions (LPD) ; Mesoporous ; Mesoporous structures ; Nanocrystalline TiO ; Outer diameters ; Photoanode ; Shell thickness ; Submicrometers ; TiO ; Loading ; Photoelectrochemical cells ; Scattering ; Solar cells ; Spheres ; Titanium dioxide ; Coloring agent ; Metal nanoparticle ; Chemistry ; Electrode ; Surface property ; Coloring Agents ; Electrodes ; Metal Nanoparticles ; Particle Size ; Solar Energy ; Surface Properties ; Titanium
  8. Source: ACS Applied Materials and Interfaces ; Volume 4, Issue 6 , 2012 , Pages 2964-2968 ; 19448244 (ISSN)
  9. URL: http://pubs.acs.org/doi/abs/10.1021/am300329p