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首页> 外文期刊>Chemistry: A European journal >Multifunctional Ag-Decorated Porous TiO_2 Nanofibers in Dye-Sensitized Solar Cells: Efficient Light Harvesting, Light Scattering, and Electrolyte Contact
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Multifunctional Ag-Decorated Porous TiO_2 Nanofibers in Dye-Sensitized Solar Cells: Efficient Light Harvesting, Light Scattering, and Electrolyte Contact

机译：染料敏化太阳能电池中多功能装饰银的多孔TiO_2纳米纤维：高效的光收集，光散射和电解质接触

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摘要

Designing the photoanode structure in dye-sensitized solar cells (DSSCs) is vital to realizing enhanced power conversion efficiency (PCE). Herein, novel multifunctional silver-decorated porous titanium dioxide nanofibers (Ag/ pTiO_2 NFs) made by simple electrospinning, etching, and chemical reduction processes are introduced. The Ag/pTiO_2 NFs with a high surface area of 163 m~2g~(-1) provided sufficient dye adsorption for light harvesting. Moreover, the approximately 200 nm diameter and rough surface of the Ag/pTiO_2 NFs offered enough light scattering, and the enlarged interpores among the NFs in the photoanode also permitted electrolyte circulation. Ag nanoparticles (NPs) were well dispersed on the surface of the TiO_2 NFs, which prevented aggregation of the Ag NPs after calcination. Furthermore, a localized surface plasmon resonance effect by the Ag NPs served to increase the light absorption at visible wavelengths. The surface area and amount of Ag NPs was optimized. The PCE of pTiO_2 NF-based DSSCs was 27% higher (from 6.2 to 7.9%) than for pure TiO_2 NFs, whereas the PCE of Ag/pTiO_2 NF-based DSSCs increased by about 12% (from 7.9 to 8.8 %). Thus, the PCE of the multifunctional pTiO_2 NFs was improved by 42%, that is, from 6.2 to 8.8%.
机译：在染料敏化太阳能电池（DSSC）中设计光阳极结构对于实现增强的功率转换效率（PCE）至关重要。本文介绍了通过简单的静电纺丝，刻蚀和化学还原工艺制成的新型多功能装饰银的多孔二氧化钛纳米纤维（Ag / pTiO_2 NFs）。高比表面积为163 m〜2g〜（-1）的Ag / pTiO_2 NFs为光收集提供了足够的染料吸附。此外，直径约200 nm的Ag / pTiO_2 NFs的粗糙表面提供了足够的光散射，并且光电阳极中NFs之间的增大的孔隙也允许电解质循环。 Ag纳米颗粒（NPs）很好地分散在TiO_2 NFs的表面，防止了煅烧后Ag NPs的聚集。此外，Ag NP的局部表面等离振子共振效应有助于增加可见波长的光吸收。优化了Ag NP的表面积和数量。 pTiO_2 NF基DSSC的PCE比纯TiO_2 NFs高27％（从6.2％到7.9％），而Ag / pTiO_2 NF基DSSC的PCE增加约12％（从7.9％到8.8％）。因此，多功能pTiO_2 NFs的PCE提高了42％，即从6.2提高到8.8％。

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