| 초록 |
Transparent organic photovoltaics (TOPVs) have attracted significant attention for building‐integrated photovoltaics (BIPV) and smart window technologies. While the various low-band gap non-fullerene acceptors are developed to realize the highly efficient organic photovoltaics (OPVs). However, in order to construct the TOPVs’ configurations, both the polymeric donors and acceptors are required to absorb NIR light, not visible region. We have synthesized various acceptor building blocks to assemble with the benzo[1, 2-b:4, 5-b']dithiophene (BDT) to build the extremely narrow bandgap polymers. In addition, to increase Voc factor, fluorine and chlorine as a halogen group can be added, lowering HOMO and LUMO. Further device optimization with non-fullerene acceptors afford both the high transparency, and sufficient PCE. Optimal composition of the highly transparent polymeric donor and non-fullerene acceptors for NIR OPVs are presented. |
