The future of solar panels may lie in coffee. Researchers at the University of California, Los Angeles (UCLA) and Solargiga Energy in China recently published the results of research in which they saw improved thermal stability of perovskite solar cells and their efficiency increasing from 17% to 20%. This was achieved by applying caffeine on the perovskite layer.

The idea began as a joke over morning coffee, the researchers said in an interview. “One day, as we were discussing perovskite solar cells, our colleague Rui Wang said: ‘If we need coffee to boost our energy then what about perovskites?

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