Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 10, Issue 11, Pages 2411-2419Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ee01900a
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Funding
- Danish Ministry of Science, Innovation and Higher Education [DFF - 1335-00037A, 11-116028, DANSCATT - 7055-00001B]
- European Union Seventh Framework Programme (FP7) [290605]
- H European Research Council through the SEEWHI Consolidator grant [ERC-2015-CoG-681881]
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We present the first comparative in situ small and wide angle X-ray scattering study of two polymers that are relevant for organic photovoltaics, during coating on a flexible substrate. From the obtained measurements we identified several differences between the drying of the two polymers. The polymer optimized for roll-to-roll coating attained its final morphological packing nearly instantly after deposition, and had the shortest drying profile. We therefore conclude that fast-drying polymers which are influenced less by drying temperature or substrate inhomogeneities are better suited for roll-to-roll coating, and that fundamentally, the kinetics of drying dominate the process in the case of roll-to-roll slot-die coating.
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