Q Cells hits 28.7% efficiency for 2T perovskite-silicon tandem solar cell

Solar lab. Source: Hanwha Q CELLS GmbH.

March 8 (Renewables Now) - Q Cells announced on Monday that it has achieved a record efficiency of 28.7% for a 2-terminal perovskite-silicon tandem solar cell in collaboration with researchers at Helmholtz-Zentrum Berlin (HZB).

The photovoltaics (PV) maker, with dual headquarters in Seoul, South Korea and Thalheim, Germany, said in a statement that it set the new world record using a Q.ANTUM-based silicon bottom cell in combination with a perovskite-based top cell. It has achieved an improvement of almost one percentage point compared with the prior record of 27.8%, set in 2020.

The German Federal Ministry for Economic Affairs and Climate Action (BMWK) and the state of Saxony-Anhalt partially funded the research and development (R&D) work associated with this record, according to the announcement.

Q Cells pointed out that while even higher perovskite-tandem cell efficiencies have already been achieved in the solar research community, these were registered using lab technology not directly transferrable into mass production.

The company has in the past year committed to increasing its R&D investment in Germany to EUR 125 million (USD 136m) over the next three years.

(EUR 1.0 = USD 1.089)

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