It's called the Shockley–Queisser limit. https://en.m.wikipedia.org/wiki/Shockley%E2%80%93Queisser_limit https://en.m.wikipedia.org/wiki/Shockley%E2%80%93Queis

It's called the Shockley–Queisser limit. https://en.m.wikipedia.org/wiki/Shockley%E2%80%93Queisser_limit https://en.m.wikipedia.org/wiki/Shockley%E2%80%93Queisser_li...