Towards high performance inverted polymer solar cells

Attempts to develop inverted polymer solar cells (PSCs) as required for achieving high efficiency and good stability have, however, met with limited success. Here, we report that a high efficiency of 8.4% was achieved for inverted PSCs. This high efficiency was obtained through interfacial engineering of solution-processed electron extraction layer, leading to facilitate electron transport and suppress bimolecular recombination. These results provided an important progress for solution-processed PSCs, and demonstrated that the inverted PSCs are comparable with the conventional PSCs.

► Inverted polymer solar cells.
► 8.4% power conversion efficiency.
► Interfacial engineering of solution-processed electron extraction layer.