title: Pinhole-Free Perovskite Films by Methylamine Iodide Solution-Assisted Repair for High-Efficiency Photovoltaics under Ambient Conditions.
abstract: In this study, we demonstrate a simple strategy for obtaining pinhole-free, homogeneous, well-crystallized perovskite films under ambient conditions. The preparation of perovskite film with high light-harvesting efficiency and long carrier lifetime is verified. By applying this film in TiO2-based perovskite solar cells (PVSCs), we achieved a high power-conversion efficiency (PCE) of 13.07%, which is doubled with respect to that of the PVSC not subjected to the same improvement procedure (6.54%). High open-circuit photovoltage, photocurrent density, and fill factor are the main contributions to the high PCE that results from low trap density and high recombination resistance of the resultant perovskite films. This work paves a new means for fabricating high-performance perovskite films and PVSC devices in an ambient atmosphere.
authors: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, P. R. China.
authors: Liang
authors: L
authors: Wang
authors: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, P. R. China.|School of Physics and Electronics, Shandong Normal University , Jinan 250014, P. R. China.
authors: Fengjing
authors: F
authors: Liu
authors: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, P. R. China.
authors: Tianjun
authors: T
authors: Liu
authors: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, P. R. China.
authors: Jiawei
authors: J
authors: Wang
authors: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, P. R. China.
authors: Xiaoyong
authors: X
authors: Cai
authors: School of Physics and Electronics, Shandong Normal University , Jinan 250014, P. R. China.
authors: Gongtang
authors: G
authors: Wang
authors: School of Petroleum and Chemical Engineering, Dalian University of Technology , Panjin Campus, Panjin 124221, P. R. China.|Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology , 2-4 Hibikino, Wakamatsu, Kitakyushu, Fukuoka 808-0196, Japan.
authors: Tingli
authors: T
authors: Ma
authors: CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, P. R. China.
authors: Chao
authors: C
authors: Jiang
keywords: ambient conditions; homogeneous; methylamine iodide; perovskite solar cell; pinhole free