Combining perovskite with silicon offers a route to producing more electricity from the same panel area.
Solar technology that combines perovskite with conventional silicon is opening new possibilities for improving clean-energy generation. A milestone announced in January 2024 demonstrated the approach in a full-sized solar module, bringing advances in solar-cell research closer to practical manufacturing.
The project brought together Oxford PV, a company spun out of the University of Oxford, and Germany’s Fraunhofer Institute for Solar Energy Systems ISE. Their module achieved 25% conversion efficiency, producing 421 watts across a designated illuminated area of 1.68 square metres. Fraunhofer described it at the time as a record for an industrial-format silicon-perovskite tandem module.
Tandem technology stacks light-absorbing materials to use more of the solar spectrum. Oxford researchers have also explored this broader multi-junction approach in thin-film devices, com
The potential extends beyond the demonstrated result. Oxford Energy reports a theoretical maximum efficiency above 43% for perovskite-on-silicon tandem cells, compared with below 30% for conventional single-junction silicon cells. These are theoretical limits, however, rather than the performance achieved by the 25% module.
Manufacturing was another important part of the achievement. Fraunhofer used equipment compatible with mass production and developed lower-temperature processes to protect the sensitive perovskite layer during assembly. At the announcement, the partners were also conducting long-term stability tests as part of work towards module certification.
For future installations, higher efficiency could mean more generating capacity on a limited rooftop or site. Whether that translates into cheaper electricity depends on manufacturing costs, durability and lifetime output. The milestone demonstrates progress towards more productive solar panels; it does not establish that solar efficiency has doubled or that electricity costs will fall by half.
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