A new solar cell could generate electricity underwater
Summary
Researchers at Yunnan University have developed new perovskite solar cells that can generate electricity underwater, specifically at depths up to 10 meters. These cells are more efficient than traditional silicon panels in low light conditions underwater and can last about 5.5 years under seawater.Key Facts
- The new solar cells use perovskite material, which can be tuned to absorb light wavelengths that penetrate water.
- Perovskite cells are usually less durable, but a special additive improves their water resistance and stability.
- The cells achieved about 35% efficiency underwater, compared to about 20% for silicon solar panels.
- In tests, the solar cells maintained 99.6% efficiency after 40 days submerged in seawater.
- The estimated lifespan of these cells underwater before efficiency drops below 80% is 5.5 years.
- The solar panel was tested in the South China Sea at depths of 2, 6, and 10 meters, successfully charging batteries.
- Power output was lower at deeper depths due to less light but more consistent than near the surface.
- The technology could be used to power underwater vehicles and sensors, supporting marine data systems and monitoring.
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