| 초록 |
The printable solar cells are the most attracting photovoltaic technologies suitable for large area and low-temperature processing. The state-of-the-art organic solar cells achieve power conversion efficiency higher than 16% via spin coating of a polymer donor and a non-fullerene acceptor. However, the spin coating is an uneconomical process because the amount of solution used is very large compared to the coating area. In addition, the uniform film area from spin coating is limited. In this regard, we herein investigate uniform film coating of a blend of polymer donor and non-fullerene acceptor via blade coating with controlled solution temperature. We demonstrate that the chilled solution of a polymer donor and a non-fullerene acceptor facilitates self-assembly of the conjugated molecules, which significantly improves optoelectronic properties of the blend film. The optimized bulk heterojunction morphology led to promising power conversion efficiency of 11.22% of organic solar cells. |
