Recent advances in PM6:Y6-based organic solar cells

The last two years have witnessed rapid progress in organic solar cells (OSCs), driven by the newly-developed nonfullerene acceptor (NFA) Y6, which contains an electron-deficient core-based central fused ring. Inspired by Y6, a lot of novel Y-series NFAs with A-DA ' D-A structures and matched polymer donors have been synthesized. Besides developing donor/acceptor materials, there are also many other factors contributing to the advances in OSCs. This review focuses on the most classic PM6:Y6 material combination and summarizes the recent progress in OSCs. First, the underlying mechanisms for the such high performance of OSCs based on PM6:Y6 are introduced. Then, the modifications of the active layer are discussed comprehensively, which involves incorporating a third monomer into PM6 to synthesize a terpolymer, towards the construction of ternary and quaternary devices, and various processing technologies. Next, the development of an interfacial layer and electrode materials in PM6:Y6-based OSCs are also summarized and discussed. Finally, perspectives and directions for the further development of OSCs are proposed.

Automated summary

The past two years have seen rapid progress in organic solar cells, driven by the newly developed nonfullerene acceptor Y6. In addition to the development of donor/acceptor materials, other factors have also contributed to the advancement of OSCs. This review focuses on the classic PM6:Y6 material combination and summarizes recent progress in OSCs.