Perovskite Solar Cells: SrTiO3/Al2O3‐Graphene Electron Transport Layer for Highly Stable and Efficient Composites‐Based Perovskite Solar Cells with 20.6% Efficiency (Adv. Energy Mater. 2/2020)

In article number 1903369, Yoon-Bong Hahn and co-workers present highly stable perovskite solar cells fabricated with perovskite/Ag-graphene and SrTiO3/Al2O3-graphene composites, achieving remarkably high photocurrent density of 25.75 mA cm−2 and power conversion efficiency of 20.6%. This composites-based device exhibits not only remarkable thermal- and photo-stability but also long-term stability, retaining 97–99% of the initial values of photovoltaic parameters, sustaining ≈93% of initial efficiency after 300 days under ambient conditions.