Yan Yao, Jianhui Hou, Zheng Xu, Gang Li and Yang Yang Effects of Solvent Mixtures on the Nanoscale Phase Separation in Polymer Solar Cells Advanced Functional Materials 18
The evolution of nanoscale phase separation in polymer:fullerene solar cells with mixture solvents is discussed. Optimum morphology is formed both laterally and vertically during spin-coating with better device performance. Supported by AFM, TEM, and XPS results, we proposed a model and identified relevant parameters for the additive, such as solubility and vapor pressure.
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