Schematic of perovskite solar cell
A schematic of a perovskite solar cell, showing that the perovskite is nestled in the center of the cell. Absorption of solar light causes the electrons to jump to higher energy levels, leaving the holes behind. Further separation of the electrons and the holes results in the generation of a current. The existence of defects that might trap the electrons or the holes, can cause the whole solar cell to lose efficiency. This image appeared in the press release "Zooming in on tiny defects".
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