Perovskite Solar Cells Endure 1,000 Hours of Extreme Heat and Moisture
A Korean catalytic extraction process removes degrading lithium ions to preserve 95 percent of photovoltaic efficiency
By Giovanni Sapere
2 min readHuman-Edited, AI-Assisted
Researchers in South Korea have developed a chemical catalytic process that allows perovskite solar cells to maintain 95 percent of their initial power conversion efficiency after 1,000 hours under harsh environmental conditions. The chemical invention resolves a long-standing durability barrier, offering a viable path for perovskite materials to support industrial renewable energy generation.
Overcoming the stability barrier in perovskite photovoltaics
Perovskite solar cells are an innovation in thin-film photovoltaic devices that offer high energy conversion rates alongside low manufacturing costs and mechanical flexibility. However, their operating lifespan has traditionally lagged far behind conventional silicon panels, lasting between two and ten years compared to the 25 to 30 years typical of silicon installations, as reported by Interesting Engineering.
Much of this degradation originates inside the hole transport layer, an essential component that facilitates electric charge movement. Standard manufacturing methods rely on lithium salts and chemical additives to enhance electrical performance, but these compounds evaporate under elevated temperatures and humidity. According to Interesting Engineering, this evaporation creates microscopic voids within the film while free lithium ions diffuse through the cell, causing structural damage and accelerating device failure.
“By solving the chronic lifetime issue, it will become an important milestone toward the commercialization of perovskite and tandem solar cells”
— SeJin Ahn, Principal Researcher, Korea Institute of Energy Research
Purifying the transport layer with catalytic extraction
To eliminate these degradation pathways, scientists at the Korea Institute of Energy Research (KIER) in Daejeon, in collaboration with the Ulsan National Institute of Science and Technology (UNIST), engineered the post-catalytic reaction filtering extraction process. This chemical invention removes destabilizing additives and residual ions before film deposition.
The process introduces a nickel oxide catalyst into the precursor solution used to form the hole transport layer. As described by Interesting Engineering, the catalyst alters its surface properties in the mixture, attracting and capturing dissolved lithium ions without requiring supplemental chemical agents. Because the nickel oxide particles are relatively large, researchers physically filter them out along with the trapped ions, yielding a purified, additive-free solution that cures into a defect-free transport layer.
Performance benchmarks and commercial outlook
Laboratory tests conducted under continuous environmental stress—at 85 degrees Celsius and 85 percent relative humidity—revealed that the purified cells retained 95 percent of their baseline efficiency after 1,000 hours of testing, according to Interesting Engineering.
In addition to enhanced stability, the treated cells registered an operational efficiency of 25.24 percent, slightly exceeding the 25.21 percent achieved by conventional additive-based cells. Published in the journal Advanced Science, the technique provides a new processing framework and valuable intellectual property that could accelerate the commercial deployment of tandem solar cells and improve the sustainability of next-generation clean energy systems, as noted by Interesting Engineering.
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