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Long-term stability of dye-sensitized solar cells using a facile gel polymer electrolyte

Ma'alinia, A ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1039/c8nj02157k
  3. Publisher: Royal Society of Chemistry , 2018
  4. Abstract:
  5. Herein, we demonstrate a facile low temperature approach to prepare a gel polymer electrolyte (GPE) based on the triiodide/iodide redox couple in a quasi-solid-state dye-sensitized solar cell (DSSC). Only one polymeric agent (i.e., hydroxypropyl cellulose (HPC)) is used for the preparation of a non-volatile GPE system for the standard liquid electrolyte containing 1-methyl-3-propylimidazolium iodide (MPII). The prepared GPE completely penetrates into a TiO2 photoanode at room temperature due to the uniform distribution of Ti, Ru and I elements in the cross-section of the electrode, forming an interpenetrating GPE/TiO2 network to access all dye molecules. The GPE with the optimum HPC : MPII weight ratio shows a high ionic conductivity of 17.8  ×  10-3 S cm-1 and a viscosity of 350 cP. The DSSC fabricated using such gel polymer electrolyte shows the best performance and energy conversion efficiency of 7.44%, with a short-circuit current density, an open-circuit voltage and a fill factor of 15.37 mA cm-2, 707 mV and 68%, respectively. The constructed quasi-solid-state cell has long-term operational stability under realistic outdoor conditions, with 90% of the initial device's efficiency after 600 h. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique
  6. Keywords:
  7. Electrolyte ; Hydroxypropylcellulose ; Imidazole derivative ; Iodide ; Polymer ; Titanium dioxide ; Article ; current density ; Electric potential ; Energy conversion ; Liquid ; Low temperature ; Molecular stability ; Oxidation reduction reaction ; Priority journal ; Room temperature ; Short circuit current ; Solid state
  8. Source: New Journal of Chemistry ; Volume 42, Issue 16 , 2018 , Pages 13256-13262 ; 11440546 (ISSN)
  9. URL: https://pubs.rsc.org/en/content/articlelanding/2018/nj/c8nj02157k#!divAbstract