https://www.helmholtz-berlin.de/pubbin/news_seite?nid=28846&sprache=en&seitenid=74699
HZB Sets New World Record for CIGS Perovskite Tandem Solar Cells - Helmholtz-Zentrum Berlin (HZB)
The CIGS perovskite tandem cell sets a new world record with a certified efficiency of 24.6%, which has been certified by Fraunhofer ISE.
new world recordtandem solar
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https://www.fraunhofer.de/en/research/lighthouse-projects-fraunhofer-initiatives/fraunhofer-lighthouse-projects/manitu.html
MaNiTU – Materials for sustainable tandem solar cells with extremely high conversion efficiency
In the Fraunhofer MaNiTU project, six Fraunhofer institutes are joining forces in developing sustainable, highly efficient and cost-effective tandem solar...
tandem solar cellsmanitu