[seec]

Do you have any real study on this?

Considering they work by basically taking electrons from the material, they are guaranteed to get much less efficient and I doubt it's a linear effect. I think once you have destroyed the first layers, it becomes much more complicated to get meaningful power depending on variables.

Solar panel talk always focuses on the ideal conditions like California, but you have to account that plenty the energy transition is necessary in place where solar panels are not that efficient to begin with.