By While perovskite solar cells continue to dominate headlines by smashing efficiency records and edging closer to commercial deployment, new research is drawing attention to a far less familiar contender: kesterite.
In a newly released video, Matt explores why this under-the-radar material could play a much bigger role in the future of solar energy than most people realize. Recent simulations suggest a version of kesterite could theoretically achieve efficiencies as high as 33.56 percent, placing it near the upper limits of what solar cells can deliver. Unlike perovskites, kesterite contains no toxic lead and is known for its long-term stability, addressing two of the biggest hurdles facing next-generation solar technologies.
The video breaks down how kesterite works, why durability matters for real-world deployment, and how recent efficiency records are renewing interest in this material after years of being overlooked. As perovskites struggle with outdoor longevity, kesterite’s resilience could prove to be a decisive advantage.
With efficiency gains accelerating and sustainability concerns rising, the question is no longer whether kesterite belongs in the solar conversation, but whether it could ultimately outpace today’s front-runner. The full video dives into what this shift could mean for the future of solar manufacturing and clean energy adoption.
This video was produced and published by Undecided with Matt Ferrell. It’s published here via a pvbuzz partnership with Matt.
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