Concretized structural evolution supported assembly-controlled film-forming kinetics in slot-die coated organic photovoltaics

Concretized structural evolution supported assembly-controlled film-forming kinetics in slot-die coated organic photovoltaics

Blog Article

Abstract Bulk-heterojunction structured small-area organic solar cells are approaching 20% power conversion efficiency, but the blurred film-forming kinetics in the fabrication of large-area devices causes significant PCE loss and restrains the potential of commercialization.Such blurring came from insufficient knowledge of structural evolution during the film-forming process.Here, we concretize the evolution process with structures detailed to the Combination Oven Accessories submolecular level by comprehensive investigations of in-situ UV-vis spectroscopy, Atomic Force Microscope, Grazing Incident Sugar Bowl Wide Angle X-ray Scattering, and molecular dynamic simulation.With such hierarchical structural knowledge, assembly-controlled film-forming kinetics is proposed to explain the whole picture.

Such assembly is determined by molecule configuration and can be tuned via external conditions.Understanding this kinetics will contribute to screening large-area device fabrication conditions, and the detailed structural knowledge could inspire the future design of novel photovoltaic materials that are intrinsically excellent in large-area device fabrications.