title: Approximately 800-nm-Thick Pinhole-Free Perovskite Films via Facile Solvent Retarding Process for Efficient Planar Solar Cells.
abstract: Device performance of organometal halide perovskite solar cells significantly depends on the quality and thickness of perovskite absorber films. However, conventional deposition methods often generate pinholes within ∼300 nm-thick perovskite films, which are detrimental to the large area device manufacture. Here we demonstrated a simple solvent retarding process to deposit uniform pinhole free perovskite films with thicknesses up to ∼800 nm. Solvent evaporation during the retarding process facilitated the components separation in the mixed halide perovskite precursors, and hence the final films exhibited pinhole free morphology and large grain sizes. In addition, the increased precursor concentration after solvent-retarding process led to thick perovskite films. Based on the uniform and thick perovskite films prepared by this convenient process, a champion device efficiency up to 16.8% was achieved. We believe that this simple deposition procedure for high quality perovskite films around micrometer thickness has a great potential in the application of large area perovskite solar cells and other optoelectronic devices.
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou 215123, China.|Department of Physics, Chemistry and Biology (IFM), Linköping University , Linköping SE-58183, Sweden.
authors.forename: Zhongcheng
authors.initials: Z
authors.lastname: Yuan
authors.affiliation: Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China.
authors.forename: Yingguo
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou 215123, China.
authors.forename: Zhongwei
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Department of Physics, Chemistry and Biology (IFM), Linköping University , Linköping SE-58183, Sweden.
authors.forename: Sai
authors.initials: S
authors.lastname: Bai
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou 215123, China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Xu
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou 215123, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Song
authors.affiliation: Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China.
authors.forename: Xingyu
authors.initials: X
authors.lastname: Gao
authors.affiliation: Department of Physics, Chemistry and Biology (IFM), Linköping University , Linköping SE-58183, Sweden.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou 215123, China.
authors.forename: Baoquan
authors.identifier: http://orcid.org/0000-0002-4507-4578
authors.initials: B
authors.lastname: Sun
keywords: components separation; crystallization; film thickness; perovskite solar cells; solvent retarding