Electrophoretic deposition and compression of titania nanoparticle films for dye-sensitized solar cells

Larissa Grinis, Snir Dor, Ashi Ofir, Arie Zaban

Research output: Contribution to journalArticlepeer-review

135 Scopus citations


Cathodic electrophoretic deposition (EPD) of commercially available TiO2 nanocrystals (P-25 and P-90, Degussa) for the formation of nanoporous electrodes for dye-sensitized solar cells (DSSCs) is reported. Thick, uniform, adherent TiO2 films were obtained from alcoholic suspensions prepared in two steps: first, nanoparticles were treated in an alcoholic suspension with a small amount of acetylacetone; second, the obtained suspension was mixed with a EPD "charging solution" with small additives of iodine, acetone and water. A modified mechanical compression technique was employed to the electrophoretically deposited films to vary the porous structure and thickness of TiO2 layers. By applying non-polar volatile organic liquids to fill the pores of dry TiO2 films before compression, we obtained a substantial improvement in the quality of the pressed films. The fabrication of multilayer electrodes enabled us to obtain TiO2 films with a thickness up to 25 μm and the photoelectric conversion efficiency up to 8.5% under 1 sun illumination.

Original languageEnglish
Pages (from-to)52-59
Number of pages8
JournalJournal of Photochemistry and Photobiology A: Chemistry
Issue number1
StatePublished - 5 Jul 2008

Bibliographical note

Funding Information:
The authors thank the Israeli Ministry of Science for funding this research. The authors also thank Degussa AG (Germany) for the kind gift of the P-90 TiO 2 nanopowder, and Dr. Judith Grinblat for the HRTEM images.


  • Compression
  • Dye-sensitized solar cell
  • Electrophoretic deposition


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