TiO2 hollow spheres and their implication for nonvolatile electrolyte-based dye-sensitized solar cells

Jong Hyuk Park, Sun Young Jung, Raehyun Kim, Junkyung Kim, Sano Soo Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For practical application of dye-sensitized solar cells (DSSCs), it is prerequisite to ensure long-term stability. While the DSSCs employing volatile solvent electrolytes show a high efficiency of over 11%, they have a poor stability due to the evaporation of electrolyte or leakage of solvent. On the other hand, non-volatile electrolytes with high stability such as ionic liquids, oligomers, conducting polymers, and hole conductors have been reported as alternatives to volatile solvent, employing these materials to DSSCs has limitations in their efficiency compared with using volatile solvent electrolytes. Recently, the novel structures of a photoelectrode have been reported in the use of nanowires, nanotubes, and hollow spheres. In particular, the electrodes containing a hollow structure have shown significant potential to possess an outstanding light-harvesting efficiency. Moreover, the hollow structure of the electrodes would have an additional advantage owing to its large porosity - good permeability of non-volatile electrolytes with high viscosity. In this study, we report a novel approach preparing the electrodes consisting of TiO2 hollow spheres. The TiO2 hollow spheres electrode shows a high area density and desirable thickness without cracks. Applying the TiO2 hollow spheres electrode to the DSSCs with non-volatile electrolytes, the solar cells exhibit superior light-harvesting efficiency and long electron diffusion length, demonstrating that the structure of TiO2 hollow spheres electrodes has a large advantage to improve the efficiency of DSSCs with non-volatile electrolytes.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Publication statusPublished - 2009
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: 2009 Mar 222009 Mar 26

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other237th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CitySalt Lake City, UT
Period09/3/2209/3/26

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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    Park, J. H., Jung, S. Y., Kim, R., Kim, J., & Lee, S. S. (2009). TiO2 hollow spheres and their implication for nonvolatile electrolyte-based dye-sensitized solar cells. In American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).