GoKawiilYunnan University team builds perovskite solar cells that work underwater
Researchers led by Simin Ma at Yunnan University developed perovskite solar cells specifically tuned to convert the blue-shifted light that penetrates several meters underwater into electricity. They addressed the material's usual weakness to moisture by adding polyhexamethylene guanidine hydrochloride, which forms a water-repelling layer and strengthens the crystal structure, improving both durability and power output.
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Perovskite solar cells have long promised cheaper, more efficient alternatives to silicon but have been held back by rapid degradation, especially from moisture. This underwater-tuned design not only sidesteps that weakness but turns cooler, dimmer aquatic conditions into an advantage, opening possibilities for powering submerged sensors, equipment, or vehicles without surfacing for energy.
- Perovskite cells were engineered to absorb the specific light wavelengths that reach underwater depths.
- A chemical additive both repels water and stabilizes the crystal lattice, tackling perovskite's main durability flaw.
- Cooler temperatures and lower light underwater may actually extend the solar cells' operational lifespan.
Source: arstechnica.com, 2026-09-14
Published there as: “A new solar cell could generate electricity underwater”
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