@vgarzareyna @billiglarper @quixoticgeek there isn't, but IMO the language of efficiency is a bit misleading when it comes to solar panels because we're using to thinking low efficiency = bad and needs fixing. That's true for fossil fuel technologies, where the energy put into the system is in a form that is rare, expensive and dangerous, so it matters a lot what percentage of that energy in is actually going to come out as useful work.
Photons from the sky are ludicrously plentiful and free, so the trajectory of solar panel manufacture has generally been to not worry too much about pushing the limits on efficiency, and work instead on making them cheaper and cheaper. And it's worked, solar is now the world's cheapest energy source! The solar panels we already know how to make are GREAT, the improvement needed is nearly all in, well, political will. (And battery storage/grid stability, but that's just political will in a trenchcoat.)