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

ABSTRACT: 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.

SUBMITTER: Inoue I 

PROVIDER: S-EPMC6644609 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Biotemplated Synthesis of TiO<sub>2</sub>-Coated Gold Nanowire for Perovskite Solar Cells.

Inoue Ippei I   Umemura Yuki Y   Raifuku Itaru I   Toyoda Kenichi K   Ishikawa Yasuaki Y   Ito Seigo S   Yasueda Hisashi H   Uraoka Yukiharu Y   Yamashita Ichiro I  

ACS omega 20170906 9

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<sub>2</sub>-coated gold nanowire (GNW) in a TiO<sub>2</sub> cell layer. We used an artificially designed cage-shaped protein to synthesize a TiO<sub>2</sub>-coated GNW in aqueous solutio  ...[more]

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