In-line, roll-to-roll morphology analysis of organic solar cell active layers. Issue 11 (6th October 2017)

• Record Type: Journal Article
• Authors: Rossander, Lea Hildebrandt; Dam, Henrik Friis; Carlé, Jon Eggert; Helgesen, Martin; Rajkovic, Ivan; Corazza, Michael; Krebs, Frederik Christian; Andreasen, Jens Wenzel
• Is Part Of: Energy & environmental science. Volume 10:Issue 11(2017)
• Page Start: 2411
• Page End: 2419
• Publication Date: 2017-10-06
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c7ee01900a
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : Polymer conformation in solution is more important for R2R solar cell performance than the crystallinity of the final coated film. Abstract : 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.