Perovskite solar cells achieve high efficiency but face significant stability hurdles
In short: Researchers reviewing the rapid development of perovskite solar cells found that while these materials have reached certified efficiencies of 22.1% in just a few years, they still face major obstacles. The study highlights that while the electricity generated is nearing theoretical limits, the next frontier involves improving voltage and ensuring the cells can last over long periods of time.
The review focuses on techniques to increase open-circuit voltage by refining charge-selective contacts and extending charge carrier lifetimes through methods like ion tailoring. This is critical because current photocurrent levels are already close to the maximum possible output.
A primary challenge is the degradation of the cells. The researchers identified that ionic movement and the lack of standardized testing protocols complicate the pursuit of long-term stability. This review synthesizes current progress but does not provide new experimental data.
Why it matters: Understanding the trade-off between high-efficiency solar power and long-term material stability is key to the next generation of green energy.
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Sources
- Summary by Intellect · source: Research: Correabaena et al. (2017). Promises and challenges of perovskite solar cells. Science.
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