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Sequential Deposition of High-Quality Photovoltaic Perovskite Layers via Scalable Printing Methods

机译：通过可扩展印刷方法顺序沉积高质量的光伏钙钛矿层

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摘要

Sequential deposition is demonstrated as an effective technology for preparation of high-performance perovskite solar cells based on lab-scale spin coating. However, devices fabricated by scalable methods are lagging far behind their state-of-the-art spin-coated counterparts, largely due to the difficulty in obtaining high-quality thin films of perovskites crystallized from printed precursors. Here, a generic strategy that allows sequential deposition of dense and uniform perovskite films via two-step blade coating is reported. The rational selection of solvent combined with a mild vacuum extraction process enables us to produce uniform lead iodide (PbI2) films over large areas. Significantly, the resulting PbI2 films possess a mesoporous structure that is highly beneficial for the insertion reaction with methylammonium iodide (MAI). It is further identified that the deposition temperature of MAI plays an important role in determining the morphology and crystallinity of the perovskite films. Solar cells using these sequentially bladed perovskite layers yield efficiencies over 16% with high fill factors up to 78%. These results represent important progress toward the large-scale deposition of perovskite thin films for practical applications.
机译：连续沉积被证明是一种基于实验室规模的旋涂制备高性能钙钛矿太阳能电池的有效技术。但是，通过可伸缩方法制造的设备远远落后于其最新的旋涂同类产品，这主要是由于难以获得从印刷前体中结晶出来的高质量钙钛矿薄膜。在此，报道了一种通用策略，该策略允许通过两步刮刀涂覆顺序沉积致密而均匀的钙钛矿薄膜。合理选择溶剂以及温和的真空萃取工艺使我们能够在大面积上生产均匀的碘化铅（PbI2）膜。重要的是，所得的PbI 2膜具有中孔结构，这对于与甲基碘化铵（MAI）的插入反应非常有利。进一步确定，MAI的沉积温度在确定钙钛矿膜的形态和结晶度中起重要作用。使用这些顺序刀片的钙钛矿层的太阳能电池可产生超过16％的效率，而高填充因子最高可达78％。这些结果代表了在实际应用中钙钛矿薄膜大规模沉积方面的重要进展。

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  • 来源
    《Advanced Functional Materials》 |2019年第24期|1900964.1-1900964.9|共9页
  • 作者

    Guo Fei; He Wenxin; Qiu Shudi; Wang Chuan; Liu Xianhu; Forberich Karen; Brabec Christoph J.; Mai Yaohua;

  • 作者单位

    Jinan Univ, Coll Informat Sci & Technol, Inst New Energy Technol, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Coll Informat Sci & Technol, Inst New Energy Technol, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Coll Informat Sci & Technol, Inst New Energy Technol, Guangzhou 510632, Guangdong, Peoples R China;

    Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Zhengzhou 450002, Henan, Peoples R China;

    Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Zhengzhou 450002, Henan, Peoples R China;

    Friedrich Alexander Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol i MEET, Martensstr 7, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol i MEET, Martensstr 7, D-91058 Erlangen, Germany|Forschungszentrum Julich, Helmholtz Inst Erlangen Nurnberg Renewable Energy, Immerwahrstr 2, D-91058 Erlangen, Germany;

    Jinan Univ, Coll Informat Sci & Technol, Inst New Energy Technol, Guangzhou 510632, Guangdong, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    perovskite; scalable printing; sequential deposition; solar cells;

    机译：钙钛矿;可缩放印刷;顺序沉积;太阳能电池;

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