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Co-Solvent Controllable Engineering of MA 0.5 FA 0.5 Pb 0.8 Sn 0.2 I 3 Lead–Tin Mixed Perovskites for Inverted Perovskite Solar Cells with Improved Stability

Author

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  • Lung-Chien Chen

    (Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan)

  • Ching-Ho Tien

    (Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan)

  • Yang-Cheng Jhou

    (Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan)

  • Wei-Cheng Lin

    (Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan)

Abstract

Use of a lead–tin mixed perovskite is generally considered an effective method to broaden the absorption wavelength of perovskite thin films. However, the preparation of lead–tin mixed perovskites is a major challenge due to the multivalent state of tin and stability in the atmosphere. This study attempted to replace the organic cation and metal elements of perovskites with a relatively thermal stable formamidinium (FA + ) and a more environmentally friendly tin element. MA 0.5 FA 0.5 Pb 0.8 Sn 0.2 I 3 lead–tin mixed perovskite thin films were prepared with the one-step spin-coating method. By adjusting the dimethylformamide (DMF):dimethyl sulfoxide (DMSO) concentration ratio of the lead–tin mixed perovskite precursor solution, the surface morphologies, crystallinity, and light-absorbing properties of the films were changed during synthesis to optimize the lead–tin mixed perovskite films as a light-absorbing layer of the inverted perovskite solar cells. The quality of the prepared lead–tin mixed perovskite film was the highest when the ratio of DMF:DMSO = 1:4. The power-conversion efficiency of the perovskite solar cell prepared with the film was 8.05%.

Suggested Citation

  • Lung-Chien Chen & Ching-Ho Tien & Yang-Cheng Jhou & Wei-Cheng Lin, 2020. "Co-Solvent Controllable Engineering of MA 0.5 FA 0.5 Pb 0.8 Sn 0.2 I 3 Lead–Tin Mixed Perovskites for Inverted Perovskite Solar Cells with Improved Stability," Energies, MDPI, vol. 13(10), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:10:p:2438-:d:357272
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    References listed on IDEAS

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    1. Rohit Prasanna & Tomas Leijtens & Sean P. Dunfield & James A. Raiford & Eli J. Wolf & Simon A. Swifter & Jérémie Werner & Giles E. Eperon & Camila Paula & Axel F. Palmstrom & Caleb C. Boyd & Maikel F., 2019. "Design of low bandgap tin–lead halide perovskite solar cells to achieve thermal, atmospheric and operational stability," Nature Energy, Nature, vol. 4(11), pages 939-947, November.
    2. Renxing Lin & Ke Xiao & Zhengyuan Qin & Qiaolei Han & Chunfeng Zhang & Mingyang Wei & Makhsud I. Saidaminov & Yuan Gao & Jun Xu & Min Xiao & Aidong Li & Jia Zhu & Edward H. Sargent & Hairen Tan, 2019. "Monolithic all-perovskite tandem solar cells with 24.8% efficiency exploiting comproportionation to suppress Sn(ii) oxidation in precursor ink," Nature Energy, Nature, vol. 4(10), pages 864-873, October.
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    Cited by:

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