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Jun, Yongseok
Lab for Solar innovation
Research Interests
  • Dye-Sensitized Solar Cell

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Dye molecules in electrolytes: new approach for suppression of dye-desorption in dye-sensitized solar cells

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Title
Dye molecules in electrolytes: new approach for suppression of dye-desorption in dye-sensitized solar cells
Author
Heo, NansraJun, YongseokPark, Jong Hyeok
Keywords
NANOCRYSTALLINE TIO2; N719 DYE; ADSORPTION; EFFICIENCY; SPECTROSCOPY; STABILITY; CIRCUIT; MECHANISMS; GENERATION; FILMS
Issue Date
201304
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.3, no., pp.1712 -
Abstract
The widespread commercialization of dye-sensitized solar cells remains limited because of the poor long-term stability. We report on the influence of dye-molecules added in liquid electrolyte on long-term stability of dye-sensitized solar cells. Dye-desorption from the TiO2 surface during long-term cycling is one of the decisive factors that degrade photocurrent densities of devices which in turn determine the efficiencies of the devices. For the first time, desorption of dye from the TiO2 surface could be suppressed by controlling thermodynamic equilibrium; by addition of dye molecules in the electrolyte. The dye molecules in the electrolyte can suppress the driving forces for the adsorbed dye molecules to be desorbed from TiO2 nanoparticles. As a result, highly enhanced device stabilities were achieved due to the reduction of dye-desorption although there was a little decrease in the initial efficiencies.
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DOI
http://dx.doi.org/10.1038/srep01712
ISSN
2045-2322
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ECHE_Journal Papers
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