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

• DOI: 10.1126/science.aaf8060
• Publication Date: 2016-06-09T19:43:52Z
• Authors: Xiong Li; Dongqin Bi; Chenyi Yi; Jean-David Décoppet; Jingshan Luo; Shaik Mohammed Za...; Anders Hagfeldt; Michael Grätzel
• Keywords: Perovskite solar cell

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 practical development is hampered by difficulties in achieving performance with large-size devices. We devised a simple vacuum flash–assisted solution processing method to obtain shiny, smooth, crystalline films electronic quality over large areas. This enabled us fabricate an aperture area exceeding 1 square centimeter, maximum 20.5%, certified PCE 19.6%. By contrast, the best date 15.6% for PSCs similar size. demonstrate that reproducibility excellent show virtually no hysteresis. Our approach enables realization highly efficient large-area deployment.