Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.

Issue 14, 2018
Previous Article Next Article

Patching defects in the active layer of large-area organic solar cells

Author affiliations


Large area fabrication of organic solar cells is critical to achieve sufficient energy for power applications. However, large-area organic solar cells still suffer from low production yields because their thin active layer (100–300 nm) is prone to form leakage current when film defects exist in the active layer. In this study, we proposed a novel strategy to patch the defects to suppress the leakage current and improve the device yield of large-area organic solar cells. The defects in the active layers have been patched by coating an insulating polymer using a Maobi tool that has the advantage of patterning and ink holding. Insulating polymers including polyethylenimine (PEI), polyvinyl alcohol (PVA), and polymethylmethacrylate (PMMA) have been used to patch the defects. Electrical insulativity, solution processability, solvent orthogonality to the active layer, good wetting on the active layer, and chemical inactivity with the active layer and interfacial layer are important properties for a good candidate used for patching the defects. The patching strategy is applicable to both fullerene-based and non-fullerene-based solar cells and can effectively restore the photovoltaic properties of the active layers with defects. Finally, we have demonstrated the construction of large-area (up to 52 cm2) monolithic none-fullerene organic solar cells with the assistance of the proposed patching strategy.

Graphical abstract: Patching defects in the active layer of large-area organic solar cells

Back to tab navigation

Supplementary files

Article information

26 Dec 2017
27 Feb 2018
First published
28 Feb 2018

J. Mater. Chem. A, 2018,6, 5817-5824
Article type

Patching defects in the active layer of large-area organic solar cells

L. Mao, L. Sun, B. Luo, Y. Jiang and Y. Zhou, J. Mater. Chem. A, 2018, 6, 5817
DOI: 10.1039/C7TA11264E

Social activity

Search articles by author