Flexible polymer solar cells with improved performance are demonstrated via judicious control of sol–gel chemistry of the ZnO electron-transporting layer.
Ta2O5–ZnO composite films with varied composition were fabricated by sol–gel processing and applied as cathodic buffer layers (CBLs) for inverted polymer solar cells, and demonstrated enhanced power conversion efficiency with excellent stability.
Flexible inverted polymer solar cells on polyethylene terephthalate substrate containing zinc oxide electron-collection-layer prepared by novel sol–gel method and low-temperature treatments