Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 95, Issue 1, Pages 318-322Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2010.04.018
Keywords
Crosslinkable electrolyte; PEGDA; Long-term stability; Dye-sensitized solar cells
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UV photo-crosslinkable polymer electrolytes based on poly(ethylene glycol) (PEG) and poly(ethylene glycol) diacrylate (PEGDA) were used in dye-sensitized solar cells (DSSCs). PEG and bifunctional PEGDA formed a crosslinked structure upon UV light illumination, confirmed by the solubility test and FTIR spectroscopy. The polymeric electrolyte was prepared by photo-polymerization after injecting the monomer electrolyte solution into the porous film in order to make close contact with the TiO2 porous film. Under AM 1.5 (100 mW/cm(2)) light irradiation for up to 20 min, a maximum 62% increase in the photo-conversion efficiency (eta%) was observed. The DSSCs with the crosslinkable PEG/PEGDA based polymer electrolyte showed improved long-term stability in comparison to those with electrolytes containing only PEG. Also, the effects of solvent on stability of the DSSCs were investigated. (c) 2010 Elsevier By. All rights reserved.
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