> Various teams from HZB had achieved a record value in late 2021 with an efficiency of 29.8% that was realized by periodic nanotextures. More recently, in summer 2022, the Ecole Polytechnique Fédérale de Lausanne, Switzerland, first reported a certified tandem cell above the 30% barrier at 31.3%, which is a remarkable efficiency jump over the 2021 value.

> Various teams from HZB had achieved a record value in late 2021 with an efficiency of 29.8%

edit: the chart from the article is great at showing the progress

https://www.helmholtz-berlin.de/pubbin/news_datei?did=15092

> More recently, in summer 2022, the Ecole Polytechnique Fédérale de Lausanne, Switzerland, first reported a certified tandem cell above the 30% barrier at 31.3%, which is a remarkable efficiency jump over the 2021 value

NREL keeps a detailed chart by technology - it's already updated with HZB's latest which is pretty impressive - the Perovskite / Si Tandem line:

https://www.nrel.gov/pv/assets/pdfs/best-research-cell-effic...

(Base webpage for the chart: https://www.nrel.gov/pv/cell-efficiency.html)