title: Facile Face-Down Annealing Triggered Remarkable Texture Development in CH3NH3PbI3Films for High-Performance Perovskite Solar Cells.
abstract: Herein, we demonstrate that the facile face-down annealing route which effectively confines the evaporation of residual solvent molecules in one-step deposited precursor films can controllably enable the formation of (110) textured CH3NH3PbI3films consisting of high-crystallinity well-ordered micrometer-sized grains that span vertically the entire film thickness. Such microstructural features dramatically decrease nonradiative recombination sites as well as greatly improve the transport property of charge carries in the films compared with that of the nontextured ones obtained by the conventional annealing route. As a consequence, the planar-heterojunction perovskite solar cells with these textured CH3NH3PbI3films exhibit significantly enhanced power conversion efficiency (PCE) along with small hysteresis and excellent stability. The champion cell yields impressive PCE boosting to 18.64% and a stabilized value of around 17.22%. Particularly, it can maintain 86% of its initial value after storage for 20 days in ambient conditions with relative humidity of 10-20%. Our work suggests a facile and effective route for further boosting the efficiency and stability of low-cost perovskite solar cells.
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Zhu
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Kang
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University , Nanjing 210093, P. R. China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Jiangsu Key Laboratory for Nano Technology , Nanjing 210093, P. R. China.
authors.forename: Tao
authors.identifier: http://orcid.org/0000-0003-1981-3469
authors.initials: T
authors.lastname: Yu
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Bihu
authors.initials: B
authors.lastname: Lv
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Yangrunqian
authors.initials: Y
authors.lastname: Wang
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Xingyu
authors.initials: X
authors.lastname: Chen
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Wang
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University , Nanjing 210093, P. R. China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, P. R. China.|Jiangsu Key Laboratory for Nano Technology , Nanjing 210093, P. R. China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zou
keywords: CH3NH3PbI3; defects; face-down annealing; perovskite solar cells; texture development