Researchers at the University of Michigan have created a lattice-like solar cell that can stretch like an accordion, allowing it to tilt along the sun’s trajectory and capture more energy. The unique solar cell is inspired by the ancient art of paper cutting, known as kirigami.
The new design helps fix a problem with most solar power systems – the sun moves and the panels don’t. the kirigami cells are made of flexible, thin-film gallium arsenide strips that have been cut in a simple, two-dimensional pattern. When the cells are stretched using a motorized mechanism, the sheets twist open into three dimensions, offering raised surfaces to track the sun over a radius of about 120 degrees. The patterned film can collect 30 per cent more solar energy than conventional cells would.
The idea has the potential to make rooftop solar much more efficient, but in the near future, researchers say it would be more feasible for smaller aerospace applications.
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