Scientists have created a one-step process for producing highly efficient materials that let the maximum amount of sunlight reach a solar cell - by finding a simple way to etch nanoscale spikes into silicon that allows more than 99 percent of sunlight to reach the cells' active elements, where it can be turned into electricity.
The more light absorbed by a solar panel's active elements, the more power it will produce. But the light has to get there. Coatings in current use that protect the active elements let most light pass but reflect some as well.
Various strategies have cut reflectance down to about 6 percent but the anti-reflection is limited to a specific range of light, incident angle and wavelength.