A vacuum flash–assisted solution process for high-efficiency large-area perovskite solar cells

Metal halide perovskite solar cells (PSCs) currently attract enormous research interest because of their high solar-to-electric power conversion efficiency (PCE) and low fabrication costs, but their practical development is hampered by difficulties in achieving high performance with large-size devices. We devised a simple vacuum flash-assisted solution processing method to obtain shiny, smooth, crystalline perovskite films of high electronic quality over large areas. This enabled us to fabricate solar cells with an aperture area exceeding 1 square centimeter, a maximum efficiency of 20.5%, and a certified PCE of 19.6%. By contrast, the best certified PCE to date is 15.6% for PSCs of similar size. We…

• SN
  Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
• KA
  King Abdulaziz City for Science and Technology
• SF
  Seventh Framework Programme

  Award: 291771
• BF
  Bundesamt für Energie