Perovskite solar cells are experiencing a breakthrough: finally a reasonable lifespan – archyde

Perovskite solar cells they are a huge family of promising power sources for the future. Like everything else, they cannot be thrown in a bag because they can use completely different perovskites, that is, they have different properties, advantages and disadvantages. However, one of the disadvantages was common to most perovskites, namely their very short lifespan. The best were usually between 1000-2000 hours under AM1.5G lighting (in our Czech conditions this corresponds to about 0.5 to 1.5 years), which is too little for practical use. However, researchers at the Helmholtz Institute Erlangen-Nürnberg at the Jülich Research Center have achieved a breakthrough that could lead to the perovskites finally being given practical properties.

The researchers tested various perovskite materials and their combinations, tested them for durability and selected the best. Building on this, an attempt was made to develop the best combination that would guarantee the longest possible service life. But that wasn’t the only adjustment. For example, they used a two-layer protective polymer that was applied to the entire electrode, which better prevents its corrosion and ensures a longer durability of the connection with the perovskite layer.

The results are incredible given the previous successes of other perovskite cells. At 65 ° C, these solar cells were able to retain 99% of their original efficiency after 1450 hours. It remains to be seen how fast the breakdown will be afterwards, but it already seems that their lifespan could be many years and maybe even more than a decade. The question, of course, is what that original efficiency was (if it were low the longevity would be useless anyway). However, it hit a very decent 20.9% which isn’t a record for the perovskites, but when combined with the longevity, it looks quite promising. Researchers believe that the potential of the news is not yet exhausted and could gradually reach between 24 and 25%. Another question, of course, is which perovskites were actually used (many of them are based on toxic materials, which somewhat hinders the pursuit of clean energy).

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