Stable perovskite module interconnects

A solar cell serial interconnect comprising:

• a bottom electrode layer;
• a first patterned line opening in the bottom electrode layer that separates the bottom electrode layer into a first bottom electrode layer of a first cell and a second bottom electrode layer of a second cell;
• a subcell layer over the bottom electrode layer;
• a second patterned line opening in the subcell layer that separates the subcell layer into a first subcell layer of the first cell and a second subcell layer of the second cell, the second patterned line opening including a first sidewall along the first subcell layer and a second sidewall along the second subcell layer laterally opposite to the first sidewall;
• a non-metallic intermediate layer along the first sidewall and the second sidewall of the second patterned line opening;
• a continuous conformal transport layer that spans over the first subcell layer, the second subcell layer, on the non-metallic intermediate layer within the second patterned line opening, and over the second bottom electrode layer within the second patterned line opening;
• a top electrode layer over the continuous conformal transport layer and on the continuous conformal transport layer within the second patterned line opening;
• and
• a third patterned line opening in the top electrode layer to separate the top electrode layer into a first top electrode layer of the first cell and a second top electrode layer of the second cell;
• wherein the second bottom electrode layer of the second subcell and the first top electrode layer of the first subcell are serially interconnected.