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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Combining a Small Hole-Conductor Molecule for Efficient Dye Regeneration and a Hole-Conducting Polymer in a Solid-State Dye-Sensitized Solar Cell
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Combining a Small Hole-Conductor Molecule for Efficient Dye Regeneration and a Hole-Conducting Polymer in a Solid-State Dye-Sensitized Solar Cell

机译：在固态染料敏化太阳能电池中，结合用于高效染料再生的小空穴传导分子和空穴传导聚合物

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In dye-sensitized solar cells (DSC) an efficient transfer of holes from the oxidized dye to the contact is necessary, which in solid-state DSC is performed by hole-conductor molecules. In this report we use photoinduced absorption and transient absorption spectroscopy to show that a small hole-conducting molecule, tris(p-anisyl) amine, regenerates dye molecules in the pores of the dye-sensitized TiO2 nanoparticle electrode efficiently even for thick (>5 μm) electrodes. For similar thicknesses we observe incomplete regeneration using a larger polymer hole-conductor. However, the performance of the solar cells with the small hole-conductor molecules is poor due to that inefficient hole conduction in these small molecules may limit the collection of the charges at the contacts. Polymer hole-conductors, which may have a good hole conductivity, also have a high molecular weight, which makes these polymers difficult to infiltrate into the smallest pores in the electrode. We show that a conducting polymer, P3HT, may be added to the small molecule hole-conductor, to enable better transport of the charges to the contact and to reduce recombination and therefore increase the photocurrent. This new device construction with a small molecule efficiently regenerating the dye molecules, and a polymer conducting the holes to the contact is therefore a promising pathway for solid-state dye-sensitized solar cells.
机译：在染料敏化太阳能电池（DSC）中，必须将空穴从氧化的染料有效转移到触点，在固态DSC中，这是由空穴导体分子完成的。在本报告中，我们使用光诱导吸收和瞬态吸收光谱法显示了一个小的空穴传导分子三（对茴香基）胺即使在很厚的地方（> 5 μm）电极。对于相似的厚度，我们观察到使用较大的聚合物空穴导体不完全再生。然而，具有小空穴导体分子的太阳能电池的性能较差，这是因为这些小分子中无效的空穴传导会限制在触点处电荷的收集。可能具有良好的空穴传导性的聚合物空穴导体也具有高分子量，这使得这些聚合物难以渗透到电极中的最小孔中。我们表明，可以将导电聚合物P3HT添加到小分子空穴导体中，以使电荷能够更好地传输到触点并减少重组，从而增加光电流。因此，这种具有小分子的新器件结构可有效地再生染料分子，而将空穴传导至接触点的聚合物则是固态染料敏化太阳能电池的有前途的途径。

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