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Spray-on PEDOT:PSS and P3HT:PCBM Thin Films for Polymer Solar Cells

机译：聚合物太阳能电池喷涂PEDOT：PSS和P3HT：PCBM薄膜

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PEDOT:PSS electron-blocking layer, and PEDOT:PSS + P3HT:PCBM stacked layers are fabricated by ultrasonic atomization and characterized by scanning electron microscopy (SEM) and optical profilometry. The measured thicknesses based on SEM and optical profilometry are quite different, indicating the incapability of measurement techniques for non-uniform thin films. The thickness measurements are compared against theoretical estimations and a qualitative agreement is observed. Results indicate that using a multiple pass fabrication strategy results in a more uniform thin film. It was also found that the film characteristics are a strong function of solution concentration and spraying passes, and a weak function of substrate speed. Film thickness increases with solution concentration but despite the prediction of theory, the increase is not linear, indicating a change in the film porosity and density, which can affect physical and opto-electrical properties. Overall, while spray coating is a viable fabrication process for a wide range of solar cells, film characteristics can be easily altered by a change in process parameters.
机译：PEDOT：PSS电子阻挡层和PEDOT：PSS + P3HT：PCBM堆叠层是通过超声雾化技术制造的，并通过扫描电子显微镜（SEM）和光学轮廓仪进行表征。基于SEM和光学轮廓测量法测得的厚度相差很大，这表明无法使用非均匀薄膜的测量技术。将厚度测量值与理论估计值进行比较，并观察到定性的一致性。结果表明，使用多次通过制造策略可产生更均匀的薄膜。还发现，膜特性是溶液浓度和喷雾道次的强函数，而底物速度的弱函数。膜厚度随溶液浓度的增加而增加，但是尽管有理论上的预测，但这种增加不是线性的，表明膜的孔隙率和密度发生了变化，这会影响物理和光电性能。总体而言，尽管喷涂是适用于多种太阳能电池的可行制造工艺，但可以通过更改工艺参数来轻松更改薄膜特性。

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