I just saw an article about a new thin-film perovskite material:

https://www.coatingsworld.com/contents/view_breaking-news/2024-08-19/solar-energy-breakthrough-could-reduce-need-for-solar-farms/

e.g.

"This ultra-thin material, using this so-called multi-junction approach, has now been independently certified to deliver over 27% energy efficiency"

"At just over one micron thick, it is almost 150 times thinner than a silicon wafer. Unlike existing photovoltaics, generally applied to silicon panels, this can be applied to almost any surface."

I've no idea what the implications are.

The usual problem with Perovskite based solar cells is that they degrade too rapidly in real world conditions. Not taking anything away from the achieved efficiencies BTW!