On the outskirts of Brandenburg an der Havel, Germany, nestled among car dealerships and hardware shops, sits a two-storey factory stuffed with solar-power secrets. It’s here where UK firm Oxford PV is producing commercial solar cells using perovskites: cheap, abundant photovoltaic (PV) materials that some have hailed as the future of green energy. Surrounded by unkempt grass and a weed-strewn car park, the factory is a modest cradle for such a potentially transformative technology, but the firm’s chief technology officer Chris Case is clearly in love with the place. “This is the culmination of my dreams,” he says.

The firm is one of more than a dozen companies betting that perovskites are finally poised to push the global transition to renewable energy into overdrive. A few niche perovskite-based PV products are already on the market, but announcements this year signal that many more are set to join them. Case says that end users should get their hands on solar panels made from Oxford PV’s cells around the middle of next year, for example. In May, a large silicon PV manufacturer, Hanwha Qcells, headquartered in Seoul, said it plans to invest US$100 million in a pilot production line that could be operational by the end of 2024.

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