Biotemplated Synthesis of TiO2-Coated Gold Nanowire for Perovskite Solar Cells

Ippei Inoue, Yuki Umemura, Itaru Raifuku, Kenichi Toyoda, Yasuaki Ishikawa, Seigo Ito, Hisashi Yasueda, Yukiharu Uraoka, Ichiro Yamashita

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Fibrous nanomaterials have been widely employed toward the improvement of photovoltaic devices. Their light-trapping capabilities, owing to their unique structure, provide a direct pathway for carrier transport. This paper reports the improvement of perovskite solar cell (PSC) performance by a well-dispersed TiO2-coated gold nanowire (GNW) in a TiO2 cell layer. We used an artificially designed cage-shaped protein to synthesize a TiO2-coated GNW in aqueous solution under atmospheric pressure. The artificially cage-shaped protein with gold-binding peptides and titanium-compound-biomineralizing peptides can bind GNWs and selectively deposit a thin TiO2 layer on the gold surface. The TiO2-coated GNW incorporated in the photoelectrodes of PSCs increased the external quantum efficiency within the range of 350-750 nm and decreased the internal resistance by 12%. The efficient collection of photogenerated electrons by the nanowires boosted the power conversion efficiency by 33% compared to a typical mesoporous-TiO2-nanoparticle-only electrode.

Original languageEnglish
Pages (from-to)5478-5485
Number of pages8
JournalACS Omega
Issue number9
Publication statusPublished - 2017 Sep 30

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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