Enabling full-scale grain boundary mitigation in polycrystalline perovskite solids - Zhao, Lichen (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics) ; Tang, PengYi (Institut Català de Nanociència i Nanotecnologia) ; Luo, Deying (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics) ; Dar, Ibrahim (University of Cambridge. Department of Physics) ; Eickemeyer, Felix (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces) ; Arora, Neha (University of Cambridge. Department of Physics) ; Hu, Qin (University of Massachusetts. Polymer Science and Engineering Department) ; Luo, Jingshan (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces) ; Liu, Yuhang (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces) ; Zakeeruddin, Shaik Mohammed (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces) ; Hagfeldt, Anders (École Polytechnique Fédérale de Lausanne. Laboratory of Photomolecular Science) ; Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia) ; Huang, Wei (Nanjing Tech University. Key Laboratory of Flexible Electronics & Institute of Advanced Materials) ; Gong, Qihuang (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics) ; Russell, Thomas (University of Massachusetts. Polymer Science and Engineering Department) ; Friend, Richard Henry (University of Cambridge. Department of Physics) ; Grätzel, Michael (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces) ; Zhu, Rui (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics)