Effects of Solvent Vapor Atmosphere on Photovoltaic Performance of Perovskite Solar Cells
Miao He,
Shuyan Chen,
Taoran Wang,
Gu Xu,
Na Liu,
Fan Xu
Affiliations
Miao He
Tsinghua-Berkeley Shenzhen Institute, Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Shuyan Chen
Tsinghua-Berkeley Shenzhen Institute, Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Taoran Wang
Energy Materials and Optoelectronics Unit, Songshan Lake Materials Laboratory, China Academy of Sciences, Dongguan 523808, China
Gu Xu
Department of Materials Science and Engineering, McMaster University, 1280 Main St. W, Hamilton, ON L8S 4L8, Canada
Na Liu
Tsinghua-Berkeley Shenzhen Institute, Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Fan Xu
Frontiers Science Center for Nano-Optoelectronics & Collaborative Innovation Center of Quantum Matter, State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Tremendous efforts have been devoted to facilitating the commercialization of perovskite solar cells (PSCs) in the past decade. However, the influence of solvent vapor atmosphere on PSC device performance during its fabrication still lacks related investigations. Here, by using three commonly employed solvent vapors during the perovskite annealing process, i.e., isopropanol, chlorobenzene and dimethylformamide, we reveal the effects of atmosphere on related perovskite film properties and device performance. The results indicate that perovskite films prepared under these external solvent vapors exhibit distinct crystalline phases, morphologies and optical properties from films under normal conditions (nitrogen gas), resulting in a significant drop in power conversion efficiency from the initial 20.01% to the lowest of only ~15%. Our work highlights the importance of atmospheric effects in preparing efficient PSCs for scalable fabrication and commercialization.
