Dye-sensitized solar cells using purified squid ink nanoparticles coated on TiO2 nanotubes/nanoparticles

Ji Won Lee, Hong Baek Cho, Tadachika Nakayama, Tohoru Sekino, Shun Ichiro Tanaka, Kenichi Minato, Takashi Ueno, Tsuneo Suzuki, Hisayuki Suematsu, Yoshinori Tokoi, Koichi Niihara

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Purified squid ink was used as a natural dye in TiO2 nanocomposite films for the fabrication of dye-sensitized solar cells (DSSCs). The squid ink extract was purified by the reaction over a proteolytic enzyme and coated onto composites of TiO2 nanotubes/nanoparticles. The resulting cells were compared with reference DSSCs in which N719 was used as a standard dye. Analysis revealed that the sub-500-nm eumelanine-based spherical nanoparticles were well adsorbed on the surface of the TiO2 nanotubes/nanoparticles, and the cells demonstrated efficiencies of 0.72 and 0.86%, respectively. The mechanisms over photosensitization induced by the purified ink particles are elucidated.

Original languageEnglish
Pages (from-to)123-127
Number of pages5
JournalJournal of the Ceramic Society of Japan
Issue number1409
Publication statusPublished - 2013 Jan


  • Dye-sensitized solar cells
  • Enzyme
  • Natural dye
  • Squid ink

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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