This is a good article about the atom and electron
Post# of 22456
Gold works best, silver works good until things degrade. There has shown promise with double walled carbon nanotubes. Most electrode materials will cause a perovskite that is say 20% efficient to drop down significantly, say 12%.
It would seem that if QMC can manipulate an electrode material to work good, stable, great transfer, they will have a real winner in solar cells.
If you see good articles about electrode development with the perovskite solar cells it would interesting.