Researchers at Martin Luther University Halle-Wittenberg (MLU) have discovered a new method to increase the efficiency of solar cells by a factor of 1,000. The team of scientists achieved this breakthrough by creating crystalline layers of barium titanate, strontium titanate, and calcium titanate, which were alternately placed on top of one another in a lattice structure.
Their findings, which could revolutionize the solar energy industry, were recently published in the journal Science Advances.
Most solar panels are ~20% efficient. So (100-20)/1000=0.08%, 100-0.08=99.92% efficient (1000x less energy loss) (you could do it the other way, but that would make less sense)