One way to increase the efficiency of a solar cell is to optimize the spectrum of sunlight for conversion into energy. This can be done by stacking two or more interconnected photoactive materials into a singular device, improving the harvesting of solar energy. Combining perovskite and silicon solar cells into a tandem device could provide a promising path toward high-performance PVs.
“Overcoming this threshold provides confidence that high-performance, low-cost PVs can be brought to the market,” writes Stefaan De Wolf and Erkan Aydin in a related Perspective.