This paper gives an overview on the recent advances oxide/metal/oxide (OMO) flexible plastic substrates and their applications as electrodes for organic perovskite solar cells. The morphological, optical electrical characteristics of different type OMO such as: IMI (ITO/Metal/ITO), ZAZ (ZnO/Au or Ag/ZnO), NAN (NiO/Ag/NiO), TAT (TiO2/Ag/TiO2), DMD (MoO3/Ag/MoO3, SnO2/Ag/SnO2 etc.) collected from...