SMRTR Science & EngineeringJul 21, 2026Interesting Engineering

New solar cells retain 97% efficiency after 2,000-hour shading stress test

SMRTR summary

Researchers at Hong Kong Polytechnic University built a new tandem solar cell that stays efficient even when shaded. By reducing defects in the cell's electricity-generating layer, the design withstood harsh negative voltage, retaining 97% efficiency after 2,000 hours of stress — outperforming current thin-film solar technologies and moving closer to real-world use.

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