We designed a new structure of perovskite solar cells with low-temperature carbon counter electrode.

Compared with Au, Ag or Pt electrodes, carbon counter electrodes are abundant, much cheaper and especially for large-scale production.

For the first time, we have a detailed study of the contact problem between perovskite and carbon layer with low temperature method.

The optimized carbon electrode with the efficiency of 7.29%, good repeatability and stability could be achieved for the perovskite solar cells.

Low-temperature carbon electrode for high efficient perovskite solar cells have the potential to realize commercialization in the near future.