AI Article Synopsis
- - High temperatures are crucial for forming stable α-FAPbI films but can also cause the loss of organic materials in perovskites.
- - A new method using a 300 °C hot-press technique effectively creates high-quality α-FAPbI films without additives, enhancing grain size and reducing strain.
- - The resulting solar cells achieve a high power conversion efficiency of 24.06% and maintain over 70% efficiency after extended exposure to challenging conditions (85°C and 85% humidity) for 1000 hours.
Article Abstract
High temperatures facilitate the formation of stable, high-crystallinity α-FAPbI films but can lead to the volatilization of organic components in perovskites. Here, a 300 °C hot-press-assisted recrystallization strategy is reported to grow stable phase-pure α-FAPbI film without any dopants. High temperature can promote the transformation of δ-FAPbI to α-FAPbI, and induces recrystallization to relieve strain. The applied pressure creates a confined space that effectively prevents the volatilization of organic components in perovskite. The α-FAPbI film prepared by hot-press at 300 °C achieves an average grain size of ≈3 µm (with grains up to 10 µm) and demonstrates excellent damp-heat stability, showing no significant change after 20 s in deionized water. The result solar cell delivers a power conversion efficiency as high as 24.06% and retains >70% of their initial efficiency value after 1000 h at 85 °C and 85% relative humidity.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11672277 | PMC |
| http://dx.doi.org/10.1002/advs.202408684 | DOI Listing |
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