A Novel Approach for the Development of Moisture Encapsulation Poly(vinyl alcohol--ethylene) for Perovskite Solar Cells.

In this study, we developed the universal encapsulation method using poly(vinyl alcohol--ethylene) (EVOH) to improve the water stability of perovskite solar cells. In order to enhance the moisture barrier property, we utilized SiO and graphene oxide (GO) fillers in the EVOH matrix. First, UV-treated SiO increased the dispersibility in the EVOH matrix and made the penetrating path more complicated, which led to a better moisture barrier property.