The European Solar Test Installation (ESTI) certification institute in Italy has confirmed the achievement of a record efficiency for
Researchers from the Berlin Center for Materials andHemholtz energies used an advanced perovskite composition with clever interface modification. It reduces the recombination loss of charge carriers. The scientists performed a detailed analysis to understand the specific properties of the interface modification. These developments were then successfully implemented in tandem solar cells.
Scheme of the structure of a solar cell.The upper cell can convert the blue parts of the spectrum, the lower one - red and near infrared waves. Various thin layers help to make optimal use of light and minimize electrical losses. Image: Eike Kohnen/HZB
The authors note that the new interface and optical modifications made it possible to obtain the highest photovoltages (open-circuit voltage) and led to a new efficiency record for tandem technology.
The researchers note that the active developmentsolar panel technologies based on these two elements are showing records that follow one after another. Only at the end of 2021, German scientists managed to achieve an efficiency of 29.8%, in the summer of this year, researchers from Switzerland for the first time overcame the 30% mark, and six months later, a new record was set again in Germany.
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Cover image: Johannes Beckedahl, Lea Zimmerman, HZB