The photoelectric conversion efficiency record of tandem solar cells is constantly being broken.
According to the German Helmholtz Association, scientists at the Helmholtz Center in Berlin (HZB) in Germany say they have produced a perovskite/silicon tandem solar cell that converts 32.5 percent of incoming sunlight into electricity— The photoelectric efficiency is as high as 32.5%, setting a new world record! The record was tested and officially confirmed by the European Solar Test Institute (ESTI), the Italian certification body.
The team led by research leader Steve Albrecht used an advanced perovskite structure and modified the interface very cleverly to reduce the loss of charge carriers. Subsequently, they evaluated the optical performance of the cell. Made improvements. Altogether, improvements in the interface and optics enabled the highest photovoltage (open-circuit voltage), ultimately enabling the cell to set a new record for photoelectric conversion efficiency of 32.5%.
The photoelectric conversion efficiency record of tandem solar cells is constantly being broken. In the second half of 2021, the HZB team achieved a photoelectric conversion efficiency of 29.8% through periodic nanofabrics; in the summer of 2022, the Swiss Ecole Polytechnique de Lausanne reported for the first time a photoelectric conversion efficiency of more than 30% - the photoelectric conversion efficiency of the tandem cells they developed Reached 31.3%.
Now, HZB has broken this record again. Albrecht said: "This is a huge leap that we did not foresee a few months ago. We are very excited about the new record, because it shows that the perovskite/silicon tandem technology is very promising in promoting sustainable energy supply. "
Professor Bernd Reish, scientific director of HZB, said: "The photoelectric conversion efficiency of the tandem solar cells developed by HZB is currently as high as 32.5%. Previously, only expensive III/V compound semiconductors such as gallium arsenide, indium gallium phosphide and Gallium and other elements can be realized, and these elements are all in the third and fifth groups of the periodic table."
(Originally titled "32.5%! Perovskite/Silicon Tandem Cell Efficiency Breaks Record")
