Biotemplated Synthesis of TiO 2 -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

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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 TiO 2 -coated gold nanowire (GNW) in a TiO 2 cell layer. We used an artificially designed cage-shaped protein to synthesize a TiO 2 -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 TiO 2 layer on the gold surface. The TiO 2 -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-TiO 2 -nanoparticle-only electrode.

Original languageEnglish
Pages (from-to)5478-5485
Number of pages8
JournalACS Omega
Issue number9
Publication statusPublished - 2017 Jan 1


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Inoue, I., Umemura, Y., Raifuku, I., Toyoda, K., Ishikawa, Y., Ito, S., Yasueda, H., Uraoka, Y., & Yamashita, I. (2017). Biotemplated Synthesis of TiO 2 -Coated Gold Nanowire for Perovskite Solar Cells ACS Omega, 2(9), 5478-5485.