This solar cellsThe base that integrates the panels is experiencing revolutionary developments. Proof of this is the success of the German scientific organization Helmholtz-Zentrum Berlin (HZB), specializing in new materials. breaking the world record for the efficiency of these cells, this means a degree of sunlight utilization that has never been achieved until now. The effects of this success are huge in all areas.
Specifically, the HZB managed to break the productivity record thanks to the tandem plate. perovskite and siliconwith which 32.5% efficiency reached, this is not less than twice the normal. Currently, the average conversion of solar radiation to electricity is 15%. The highest efficiency ever known has reached 23%.
Numerous scientific institutions on the planet are in a real race to increase the capacity of photovoltaic panels to convert solar radiation into electricity. In fact, HZB had already achieved 29.8% efficiency a year ago. Thanks to the use of periodic nanotextures. However, that same summer, scientists from another organization, the Federal Polytechnic School of Lausanne (Switzerland), took the gold medal from them, reaching 31.3% on this particular podium, along with another cell.
However, a few weeks ago, German scientists at HZB once again regained the lead with the combination of silicon and perovskite that yielded the aforementioned 32.5%, the highest level ever achieved, according to their website.
an unexpected breakthrough
“This is a huge advance that we couldn’t have foreseen a few months ago,” said HZB professor Steve Albrecht, who assures his team is “working together with success and passion” to reach this milestone. The success was confirmed by the Italy-based European Solar Testing Establishment (ESTI), which measures the cell’s efficiency.
The secret of this breakthrough lies in the properties of perovskite with modified interface.. Researchers participating in the project were able to reduce efficiency losses after examining the properties of this material in detail. Later, they made tandem solar cells combined with others with better optics, thus achieving higher efficiency.
In practice, two different cells are combined on top of each other, the perovskite cell being the one on top. Thin layers between the two allow to maximize the use of light and minimize electrical losses.
“We’re very excited about the new value because it’s perovskite/silicone tandem technology shows great promise To contribute to a sustainable energy supply,” explained Albrecht.
HZB Scientific Director Bernd Rech emphasizes: “The efficiency of HZB tandem solar cells is now 32.5 percent, in the range previously achieved only with expensive III/V semiconductors. The NREL graph clearly shows how spectacular the last two increases of EPFL and HZB are . . . ”
Reference article: https://www.helmholtz-berlin.de/pubbin/news_seite?nid=24348;sprache=en
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