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Effects of Solvent Mixtures on the Nanoscale Phase Separation in Polymer Solar Cells

机译:溶剂混合物对聚合物太阳能电池纳米级相分离的影响

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The mixed solvent approach has been demonstrated as a promising method to modify nanomorphology in polymer solar cells. This work aims to understand the unique role of the additive in the mixture solvent and how the optimized nanoscale phase separation develops laterally and vertically during the non-equilibrium spin-coating process. We found the donor/acceptor components in the active layer can phase separate into an optimum morphology with the additive. Supported by AFM, TEM and XPS results, we proposed a model and identified relevant parameters for the additive such as solubility and vapor pressures. Other additives are discovered to show the ability to improve polymer solar cell performance as well.
机译:混合溶剂方法已被证明是修饰聚合物太阳能电池中纳米形态的一种有前途的方法。这项工作旨在了解添加剂在混合溶剂中的独特作用,以及在非平衡旋涂过程中优化的纳米级相分离在横向和垂直方向上如何发展。我们发现活性层中的施主/受主组分可以与添加剂相分离成最佳形态。在AFM,TEM和XPS结果的支持下,我们提出了一个模型,并确定了添加剂的相关参数,例如溶解度和蒸气压。发现其他添加剂也显示出改善聚合物太阳能电池性能的能力。

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