title: High-Quality Perovskite Films Grown with a Fast Solvent-Assisted Molecule Inserting Strategy for Highly Efficient and Stable Solar Cells.
abstract: The performance of organolead halide perovskites based solar cells has been enhanced dramatically due to the morphology control of the perovskite films. In this paper, we present a fast solvent-assisted molecule inserting (S-AMI) strategy to grow high-quality perovskite film, in which the methylammonium iodide/2-propanol (MAI/IPA) solution is spin-coated onto a dimethylformamide (DMF) wetted mixed lead halide (PbX2) precursor film. The DMF can help the inserting of MAI molecules into the PbX2 precursor film and provide a solvent environment to help the grain growth of the perovskite film. The perovskite film grown by the S-AMI approach shows large and well-oriented grains and long carrier lifetime due to the reduced grain boundary. Solar cells constructed with these perovskite films yield an average efficiency over 17% along with a high average fill factor of 80%. Moreover, these unsealed solar cell devices exhibit good stability in an ambient atmosphere.
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Yuan
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Zhiwen
authors.initials: Z
authors.lastname: Qiu
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Chaomin
authors.initials: C
authors.lastname: Gao
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Hailiang
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Yanan
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Cuncheng
authors.initials: C
authors.lastname: Li
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Jinghua
authors.initials: J
authors.lastname: Yu
authors.affiliation: Materials Research Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, and ‡School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, Shandong, China.
authors.forename: Bingqiang
authors.initials: B
authors.lastname: Cao
keywords: large grains; long-term stability; morphology; perovskite; solar cell; solution process