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Tandem perovskite-silicon solar cells retained 80% of efficiency after 1 year – pv magazine International


Researchers in Saudi Arabia declare to have improved the exterior stability of a tandem perovskite-silicon photo voltaic cell through the use of correct encapsulation. On the finish of the primary 12 months of operation, the cell fill issue remained above 70%.

Scientists from the King Abdullah College of Science and Know-how (KAUST) in Saudi Arabia performed a year-long out of doors take a look at for the tandem perovskite-silicon photo voltaic cell they developed in 2020. They discovered that the system remained greater than 80 % of its preliminary effectivity. in the course of the trial interval between April 2021 and April 2022.

“We aren’t speaking about 500 hours or 1,000 hours in a managed surroundings within the lab, however truly measuring exterior for a few years,” mentioned researcher Maxime Babics. pv journal, famous that the trial had simply begun. “Now that the effectivity of tandem cells is past 30%, I actually assume it is time to give attention to sustainability, with not less than 20 years of operation in thoughts.”

The analysis workforce described its findings in “A 12 months of operation exterior the monolithic perovskite/silicon tandem photo voltaic cells,” which was not too long ago printed in Cell Stories Bodily Science. They famous the significance of robust encapsulation to reduce encapsulation-related failures.

Lecturers promote two steel wires on each side of the cell to increase the electrode contacts. Then they encapsulated the system between BOTH layers on thermoplastic polyurethane (tpu) and glass in entrance of the module lamination.

They deployed the tandem photo voltaic cell at a tilt angle of 25 levels and southern orientation. They examined it at a KAUST take a look at facility in Saudi Arabia, which has a which is internationalzontal irradiance (GHI) of roughly 2,240 kWh per sq. meter.

“This mixture of excessive irradiance, excessive temperature, and excessive relative humidity make this given location a challenging surroundings for perovskite-based photo voltaic cells however a most related location to review the out of doors resilience of PV applied sciences,” mentioned the scientists.

The fill issue of the tandem system stays above 78% within the first 4 months after which step by step decreased from August to December to 72%. On the finish of the primary 12 months of operationit stays above 70%.

“Figuring out that the filling issue is the parameter most prone to exterior harm, the outcomes promise to realize a steady tandem know-how,” mentioned the researchers.

They famous that on the finish of April 2021, the cell was nonetheless capable of keep greater than 80% of its preliminary effectivity.

“It is a large leap for us when it comes to out of doors energy however clearly now we have room for enchancment,” Babics mentioned. “It is usually necessary to say that this technology of tandems was developed in our lab on the finish of 2020 and I’m assured to say that the brand new technology of tandems that we’re at present producing will give higher outcomes.”

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