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.

中文翻译：

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钙钛矿型太阳能电池用TiO ₂包覆的金纳米线的生物模板合成

纤维纳米材料已被广泛用于改善光伏器件。由于其独特的结构，它们的光捕获能力为载体运输提供了直接途径。本文报道了通过在TiO ₂电池层中均匀分散的TiO ₂涂层金纳米线（GNW）改善钙钛矿太阳能电池（PSC）性能的方法。我们使用人工设计的笼状蛋白在大气压下在水溶液中合成了TiO ₂包覆的GNW。具有金结合肽和钛化合物生物矿化肽的人工笼形蛋白可以结合GNW，并选择性地在金表面沉积一层TiO ₂薄层。TiO ₂在PSC的光电电极中掺入的GNW涂层可增加350-750 nm范围内的外部量子效率，并使内部电阻降低12％。与典型的仅介孔TiO ₂纳米颗粒电极相比，纳米线对光生电子的有效收集使功率转换效率提高了33％。