The technique could be the gateway to new generations of solar cells, light-emitting diodes and photodetectors.
Perovskite solar cells (PSCs) can offer high light-conversion efficiency with low manufacturing costs. But to be commercially viable, perovskite films must also be durable and not degrade under solar light over time.
Although perovskite solar cells have only been developed within the past few years, they are already almost as energy-efficient as silicon.
Using the compound eye as a model, the researchers created a compound solar cell consisting of a vast honeycomb of perovskite microcells, each encapsulated in a hexagon-shaped scaffold just 0.02 inches (500 microns) wide.
The researchers have built solar cells that have power conversion efficiencies averaging 18 percent – with some as high as 20 percent.
Researchers have uncovered the exact mechanism that causes new solar cells to break down in air, paving the way for a solution.