Soitec revealed that at a solar light concentration of 319, the efficiency of the cell reaches 43.6%. Furthermore, the company stated that when the concentration is between 250 and 500, the efficiency will surpass 43%. This improvement is expected to outperform current three-junction solar cells, positioning Soitec at the forefront of high-efficiency photovoltaics.

André-Jacques Auberton-Hervé, CEO of Soitec, emphasized the importance of this breakthrough: “This efficiency gain represents a major step beyond traditional photovoltaic economics. This achievement can bring substantial value to our solar energy sector and validate our long-term strategy and business model in the solar market.”

“Working with two of the world’s leading research institutions—Fraunhofer ISE and CEA-Leti—we have achieved remarkable progress in a short time. Looking ahead, we aim to continue refining this concept and hope to reach a 50% conversion efficiency for solar cells by 2015,” he added.

The four-junction design incorporates two dual-junction subcells. These subcells are grown on a separate III-V compound semiconductor, allowing for a broader capture of the solar spectrum through optimized bandgap composition. Soitec utilized its proprietary semiconductor bonding and layer transfer technology, which has been widely used in the semiconductor industry for decades, to develop this advanced cell structure.

This innovative battery was jointly developed by Soitec, Fraunhofer ISE, and the Helmholtz Center for Materials and Energy. CEA-Leti, based in Grenoble, France, also played a key role in the project. (Translator: Krystal)

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