A bunch of researchers from the Helmholtz-Zentrum Berlin (HZB) has achieved a brand new world effectivity document for a silicon-perovskite tandem photo voltaic cell, with an authorized effectivity of 32.5%.
From pv journal Germany
HZB has as soon as once more damaged the world effectivity document for tandem photo voltaic cells consisting of a silicon backside cell and a perovskite prime cell. The 32.5% effectivity document was formally confirmed by the certification institute European Photo voltaic Check Set up.
“This can be a large leap ahead that we did not count on a number of months in the past,” mentioned Steve Albrecht from HZB’s perovskite tandem photo voltaic cell division. “All of the groups concerned in HZB, particularly the groups from the PV Competence Heart (PVcomB) and the HySPRINT Innovation Lab, work very properly and have nice dedication to it.
His workforce used a modified perovskite compound with a modified floor. Silvia Mariotti and Eike Köhnen, each authors of the examine, have developed a modification of the interface during which cost recombination losses are largely suppressed. As well as, they apply particular measurement methods to raised perceive the basic processes. These enhancements had been efficiently transferred to tandem photo voltaic cells and mixed with extra optical enhancements by Lea Zimmermann.
Lately, there was a steady enhance within the effectivity values of assorted analysis establishments and photovoltaic firms world wide. By the top of 2021, varied groups from HZB had achieved a document worth of 29.8% effectivity. To realize this, they launched particular, periodic nanotextures in photo voltaic cells. Then, this summer season, the Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland, managed to surpass that worth once more, attaining 31.3% effectivity in an authorized tandem cell.
Now the best worth of 32.5% effectivity is once more achieved by HZB. “We’re very joyful about this important leap in effectivity. It exhibits the excessive potential of perovskite/silicon tandem photo voltaic cells to contribute to a sustainable vitality provide and transformation within the coming years,” mentioned Albrecht.
HZB’s chief scientific officer, Bernd Rech, says that “at 32.5%, the photo voltaic cell effectivity of HZB’s tandems is now within the ranges beforehand solely achievable with costly III/V semiconductors. “
Final week, Meyer Burger signed a multi-year cooperation settlement with a number of analysis institutes in Germany and Switzerland, together with HZB. It includes the industrialization of perovskite tandem photo voltaic cells and modules.
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