I think what's happening is bare processed silicon wafers are cheap enough that that other costs of a panel are starting to dominate. That pushes you towards using high efficiency cells in order to reduce number of panels needed.
I think Perovskites are interesting because they are cheap and can get you 25% efficiency in a single layer cell.
I think Perovskites are interesting because they are cheap and can get you 25% efficiency in a single layer cell.