Bifacial Perovskite Solar Cells via a Rapid Lamination Process

Hybrid perovskite solar cells are considered a promising choice for next-generation thin-film photovoltaic technology. To meet commercialization requirements, more research efforts have now been focused on developing potentially high throughput fabrication methods compatible with perovskite chemistry. Here we show that bifacial perovskite solar cells can be made by a rapid lamination process in ambient air within 60 s. Upon optimization, these devices show an average single-side efficiency above 15% and bifaciality of 0.93. The bifacial feature enables light collection from both sides and can boost the overall performance by 10% or more. These results and further studies can provide unique opportunities to design new device architectures and fabrication methods for highly functional perovskites photovoltaics.