Qcells sets a global benchmark with 28.6% conversion efficiency for its commercial-size tandem solar cells.
The solar industry continues to reach new heights in innovation, particularly in the realm of perovskite solar technology. The latest breakthrough comes from Germany, where Qcells, a leading manufacturer, announced a record-breaking 28.6% light-to-electricity conversion efficiency for its perovskite/silicon tandem solar cells on December 20, 2024.
While higher efficiency records have been achieved—such as the 29.8% milestone set by 3SUN’s megafactory in Sicily—Qcells’ achievement stands out due to its focus on commercial scalability.
Why Qcells’ Record is a Game-Changer
Qcells’ record-breaking efficiency was achieved using an M10 solar cell, one of the latest formats in commercial photovoltaics. Measuring 182 mm x 182 mm, with a surface area exceeding 330 cm², the M10 cell dwarfs the smaller 9 cm² cells used by competitors to set similar records. This larger size underscores its readiness for mass production, a key step toward commercial viability.
The achievement reflects years of research and development by Qcells, which has been working on tandem perovskite-silicon technology since 2016. The lower silicon cell in the tandem structure is based on Qcells’ proprietary Q.ANTUM technology, ensuring high performance and scalability.
Advancing Photovoltaic Performance
“The tandem cell technology developed at Qcells accelerates the commercialization of this breakthrough and ultimately represents a significant leap in photovoltaic performance,” said Danielle Merfeld, Global CTO at Qcells.
The record-setting cell was produced at Qcells’ R&D pilot line in Germany, leveraging a standard industrial silicon wafer. This approach allows for seamless integration into existing industrial modules, utilizing commercial-grade processes and tools optimized for mass production, rather than relying on proof-of-concept lab environments.
Committed to Solar Innovation
“We are dedicated to advancing the next generation of solar energy efficiency,” Merfeld added. “We will continue investing heavily in R&D to drive progress in this field, as every kilowatt counts in the journey toward building a more sustainable future.“
The record-breaking efficiency of 28.6% was independently verified by CalLab at the Fraunhofer Institute for Solar Energy Systems (ISE), cementing Qcells’ achievement as a milestone in the photovoltaic sector.
