We have demonstrated that using a bi-interlayer of water-free poly(3,4-ethylenedioxythiophene) (PEDOT) and fluorinated reduced graphene oxide (FrGO) significantly improves the efficiency and stability of perovskite solar cells (PeSCs). With simple, low-temperature solution processing, the PeSCs with the PEDOT + FrGO interlayer achieve a power conversion efficiency (PCE) of 14.9%. The enhanced PCE is mainly due to reduced recombination, facilitated by interfacial dipoles at the PEDOT/FrGO interface. Moreover, these devices maintain 70% of their initial PCE after 30 days of exposure to ambient conditions, thanks to the hydrophobic FrGO layers protecting the perovskite films.
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
