Perovskite solar cells retain 98% efficiency after 1,200 hours at 194°F heat

Rice University researchers improved perovskite solar cell durability using a modified precursor solution with a two-dimensional perovskite and formamidinium chloride.

The additives helped control crystal growth, stabilize the useful black phase, and slow degradation in halide perovskite films.

In accelerated aging tests at 194°F for 1,200 hours, the films retained 98% of their efficiency.

The result points to a more practical route for high-performance perovskite photovoltaics and tandem solar cells with silicon.