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UNSW researchers have teamed up with industry partner UtmoLight to achieve a world-record efficiency for a large-area perovskite solar submodule. The UNSW team, led by Xiaojing Hao, a Scientia professor, achieved a certified stabilized power conversion efficiency of 23.5%, beating the previous benchmark by 0.6 percentage points.
The result is particularly significant because it sets an efficiency benchmark for a 30 x 30 cm perovskite submodule, with an aperture area of 676 cm2, further narrowing the efficiency gap with small-area laboratory cells, which are typically only around 1 cm2.
The researchers say the world record demonstrates that perovskite solar technology can maintain high efficiency across much larger areas than laboratory-scale cells, highlighting its potential for scalable manufacturing and widespread use in photovoltaic modules.
"For us, this is not only about setting another efficiency record. It is about developing materials and device concepts that continue to perform when they are translated from laboratory cells to industrially relevant areas," said Hao, from UNSW's School of Photovoltaic and Renewable Energy Engineering.
"Materials that work exceptionally well in a small laboratory device do not necessarily behave in the same way under scaled-up processing conditions.
"Our focus is therefore not simply on finding high-performance materials, but on understanding how to design materials and interfaces that remain effective under the conditions required for large-area fabrication."
Perovskite is widely hailed as a potentially important next-generation solar material because of its ability to convert sunlight into electricity with very high efficiency, while also offering the prospect of relatively low-cost manufacturing.
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