Engineers close in on 40% efficiency with next-gen solar cells

Researchers at The Hong Kong Polytechnic University (PolyU), led by Professors Li Gang and Yang Guang, have made significant strides in improving perovskite/silicon tandem solar cells (TSCs), aiming to boost their energy conversion efficiency from about 34% to nearly 40%. These next-generation solar cells have the potential to outperform traditional silicon cells, offering a promising path toward more efficient, stable, and scalable photovoltaic technology. The team’s work addresses key challenges such as maintaining device reliability when scaling from lab-scale to commercial-sized modules, mitigating degradation caused by environmental factors like moisture and ultraviolet light, and ensuring manufacturing processes meet industrial standards. In addition to technical hurdles, the researchers highlight environmental concerns related to the use of rare elements and lead in perovskite materials. They advocate for the development of sustainable alternatives and effective lead recycling systems to ensure the technology’s long-term viability. Emphasizing interdisciplinary collaboration among academia, industry, and research institutions, the team stresses that integrating material science