Oxford PV has achieved 27.3% conversion efficiency on a 1 cm² perovskite-silicon tandem solar cell, which has been certified by Fraunhofer Institute for Solar Energy Systems ISE. This efficiency exceeds the previous 26.7% efficiency record for a single-junction silicon solar cell, according to Oxford PV. The British company aims to go beyond 30% efficiency for its perovskite-silicon solar cell technology.
It says it is the process of scaling the technology from lab to high volume manufacturing. At its industrial pilot line in Germany, Oxford PV is producing commercial sized 156 mm x 156 mm perovskite-silicon solar cells. On its website, it says, "Oxford PV will licence its first commercial product to select manufacturing partners." The firm doesn't name the development partner, but it does say the cells will be validated by a 'major manufacturer of silicon solar cells and modules'.
"This result further validates the ability of perovskite to enhance the performance of silicon based photovoltaics. Continuing to improve the performance of photovoltaics is fundamental for sustaining the growth of solar generated electricity," said CEO Frank P. Averdung.
Oxford PV, which has a research and development site in Oxford, UK, was launched in 2010 as a spin-off from the University of Oxford.
A few days back, the firm announced a perovskite-silicon two-terminal tandem solar cell efficiency of 25.2% in partnership with Helmholtz-Zentrum Berlin (HZB) and the Photovoltaics and Optoelectronics Device Group at the University of Oxford. This cell was also certified by Fraunhofer ISE Germany.
The company works on a two-terminal design to produce its perovskite-silicon tandem solar cell technology. It is aimed at easing integration of cells into module fabrication and PV systems, while doing away with the need to add materials, weight and power inverter challenges of four-terminal tandem cells.
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