Indium-free Cu/fluorine doped ZnO composite transparent conductive electrodes with stretchable and flexible performance on poly(ethylene terephthalate) substrate

- Cu/FZO bilayer films grow on PET substrates at room temperature.
- The lowest resistivity of 6.6 × 10−5 Ω cm is obtained.
- The Cu/FZO film exhibits mechanical flexibility and stability.