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

Lung-Chien Chen, Ching-Ho Tien, Yang-Cheng Jhou and Wei-Cheng Lin
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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

Energies, 2020, vol. 13, issue 10, 1-12

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%.

Keywords: lead–tin mixed perovskite; perovskite solar cell; less-lead perovskite (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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