The semi-transparent perovskite solar cell absorbs UV, blue and yellow visible light. It allows red light and infrared radiation to pass through. Based on this principle, a double-layer â€œtandem solar cellâ€ can be built with an efficiency that is much higher than single-layer solar cells. (Image: Empa)
Scientists have discovered how to make the electrical wiring on top of solar cells nearly invisible to incoming light. The new design, which uses silicon nanopillars to hide the wires, could dramatically boost solar-cell efficiency.