The text below the image reads: “SOLAR SPECTRUM. / FROM NEGATIVES MADE WITH AN INTERFERENCE GRATING BY LEWIS M. RUTHERFURD, NEW YORK, 1875 / PRINTED AND PUBLISHED BY OSCAR G. MASON, NEW YORK, U. S. A.

New research from Germany has shown how improving top-cell transparency and performance remains key to the commercialization of tandem perovskite-silicon solar cells, as well as for all other types of ...