Biotemplated Synthesis of TiO 2 -Coated Gold Nanowire for Perovskite Solar Cells

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-...

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Bibliographic Details
Published in:ACS omega 2017-09, Vol.2 (9), p.5478-5485
Main Authors: Inoue, Ippei, Umemura, Yuki, Raifuku, Itaru, Toyoda, Kenichi, Ishikawa, Yasuaki, Ito, Seigo, Yasueda, Hisashi, Uraoka, Yukiharu, Yamashita, Ichiro
Format: Article
Language:English
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Summary: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 -coated gold nanowire (GNW) in a TiO cell layer. We used an artificially designed cage-shaped protein to synthesize a TiO -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 layer on the gold surface. The TiO -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 -nanoparticle-only electrode.
ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.7b00940