Preparation of dye sensitized solar cell by using supercritical carbon dioxide drying

Yoshio Iwai, Takuto Nakashima, Setsuko Yonezawa

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Abstract

Dye-sensitized solar cells (DSSC) derived from TiO2 aerogel film electrodes were fabricated. TiO2 aerogels were obtained by using sol-gel method and supercritical carbon dioxide (sc-CO2) drying. First, TiO2 wet gels were obtained by sol-gel method. Then, the solvents in the TiO2 wet gels were replaced by acetone. The TiO 2 aerogels were obtained by using sc-CO2 drying from the TiO2 wet gels. The conditions of sc-CO2 drying were at 313, 323 K and 7.8-15.5 MPa. The electrodes with TiO2 aerogel films were obtained by deposition of the aerogels on glass substrates. The electrodes with TiO2 aerogel films and a commercial particle film of various thickness were obtained by repetitive coatings and calcinations. The amount of dye adsorbed on the TiO2 films with sc-CO2 drying was higher than that of commercial particle film. The amount of dye adsorbed on the TiO2 films increased with increasing surface area of the TiO 2 film. DSSCs were assembled by using the TiO2 aerogel film electrodes and their current-voltage performance was measured. The power performance of DSSC made by supercritical drying was higher than that of commercial particles. The DSSC with the film electrode made at 313 K and 15.5 MPa showed the best power performance (Jsc = 7.30 mA/cm2, Voc = 772 mV, η = 3.28%).

Original languageEnglish
Pages (from-to)153-157
Number of pages5
JournalJournal of Supercritical Fluids
Volume77
DOIs
Publication statusPublished - Apr 17 2013

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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