Design of the Solution‐Processed Intermediate Layer by Engineering for Inverted Organic Multi junction Solar Cells

An equivalent ohmic contact is successfully formed between low-conductivity poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) and solution-processed aluminum-doped ZnO (AZO). Because of its promising optical and electrical properties, this combination can serve as an efficient interconnection layer as well as an optical spacer in inverted-structure organic tandem devices.