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首页> 外文期刊>Macromolecules >Effect of Alkyl Side Chains of Conjugated Polymer Donors on the Device Performance of Non-Fullerene Solar Cells
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Effect of Alkyl Side Chains of Conjugated Polymer Donors on the Device Performance of Non-Fullerene Solar Cells

机译：共轭聚合物给体的烷基侧链对非富勒烯太阳能电池器件性能的影响

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摘要

The influence of the chemical: structure of conjugated polymers on the nanophase separation and device performance in fullerene-based solar cells has been widely studied, while this is, less investigated in non-fullerene solar cells. In this work, we design three conjugated polymers With-different length of side chains, and we find that the length of side chains has little influence on the quantum efficiencies of non-fullerene solar cells. As a comparison, the length of side chains has a significant effect on the quantum efficiencies of fullerene-based solar cells. This indicates that morphology of the blended thin films in non-fullerene solar, cells is rather independent of the length of the donor side chains; and the mechanism for morphology evolution in the non-fullerene system is completely different from that in the fullerene system. Our conclusion is confirmed by a variety of advanced characterization techniques. The studies reveal that in blended thin films based on the non-fullerene material the donor polymers with different side chains have a Similar coherence length of pi-pi stacking, crystal size and domain purity, giving rise-to similar internal quantum efficiency and power conversion efficiency of the solar cells.
机译：共轭聚合物的化学结构对富勒烯型太阳能电池的纳米相分离和器件性能的影响已得到广泛研究，而在非富勒烯太阳能电池中，这方面的研究较少。在这项工作中，我们设计了三种侧链长度不同的共轭聚合物，发现侧链的长度对非富勒烯太阳能电池的量子效率影响很小。作为比较，侧链的长度对基于富勒烯的太阳能电池的量子效率具有重要影响。这表明非富勒烯太阳能电池中混合薄膜的形态与供体侧链的长度无关。非富勒烯体系中形态演化的机理与富勒烯体系中形态演化的机理完全不同。我们的结论被各种先进的表征技术所证实。研究表明，在基于非富勒烯材料的混合薄膜中，具有不同侧链的供体聚合物具有相似的pi-pi堆积相干长度，晶体尺寸和畴纯度，从而产生相似的内部量子效率和功率转换太阳能电池的效率。

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