Perovskite solar cells. Free Technical Library News

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Perovskite solar cells

17.07.2022

Perovskite is an extremely promising mineral for the construction of solar panels. However, the main problem of such products is their short service life. Researchers from Princeton University in the US have finally tested in the laboratory a sample that can work without replacement for up to 30 years in real conditions.

Although silicon has been the main material for solar panels for decades, perovskite has been actively gaining ground over the past 15 years. Perovskite is as efficient as silicon but allows for less expensive, lighter and more flexible panels. However, perovskites are not very stable and are rather short-lived in real-world use.

In the new study, the Princeton scientists added a special intermediate layer just a few atoms thick between the light-absorbing perovskite and charge-carrying layers to stabilize the structure. The intermediate layer is made of carbon disulphide, lead, iodine and chlorine and is used to protect the structure from rapid burnout.

Although similar solutions have been proposed before by various teams, the new formulation has the potential to keep solar cells alive for more than 30 years - the first solution in its class to cross the 20-year threshold.

For now, it's just about experimentation. The researchers used an artificial aging chamber to evaluate the "survivability" of the panels, in which the elements were exposed to sunlight and temperatures ranging from 35°C to 110°C. After extrapolating the data, the team concluded that under standard climatic conditions, the new solution can work for 30 years.

According to scientists, the artificial aging chamber used will allow testing the stability of not only perovskite, but also any other solar cells.

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