The Effect of Antisolvent Treatment on the Growth of 2D/3D Tin Perovskite Films for Solar Cells

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL ACS Energy Letters Pub Date : 2024-12-17 DOI:10.1021/acsenergylett.4c02745

Ganghong Min, Robert J. E. Westbrook, Meihuizi Jiang, Margherita Taddei, Ang Li, Thomas Webb, Sanjayan Sathasivam, Amanz Azaden, Robert G. Palgrave, David S. Ginger, Thomas J. Macdonald, Saif A. Haque

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Abstract

Antisolvent treatment is used in the fabrication of perovskite films to control grain growth during spin coating. We study widely incorporated aromatic hydrocarbons and aprotic ethers, discussing the origin of their performance differences in 2D/3D Sn perovskite (PEA_0.2FA_0.8SnI₃) solar cells. Among the antisolvents that we screen, diisopropyl ether yields the highest power conversion efficiency in solar cells. We use a combination of optical and structural characterization techniques to reveal that this improved performance originates from a higher concentration of 2D phase, distributed evenly throughout the 2D/3D Sn perovskite film, leading to better crystallinity. This redistribution of the 2D phase, as a result of diisopropyl ether antisolvent treatment, has the combined effect of decreasing the Sn⁴⁺ defect density and background hole density, leading to devices with improved open-circuit voltage, short-circuit current, and power conversion efficiency.

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反溶剂处理对用于太阳能电池的 2D/3D 锡过氧化物薄膜生长的影响

在制造过氧化物薄膜时，会使用反溶剂处理来控制旋涂过程中的晶粒生长。我们研究了广泛掺入的芳香烃和烷基醚，讨论了它们在二维/三维锡包晶石（PEA0.2FA0.8SnI3）太阳能电池中的性能差异。在我们筛选的抗溶剂中，二异丙基醚在太阳能电池中产生的功率转换效率最高。我们采用光学和结构表征技术相结合的方法揭示了这种性能的提高源于二维相的浓度提高，二维相均匀地分布在整个二维/三维锡包晶石薄膜中，从而提高了结晶度。经过二异丙基醚反溶剂处理后，二维相的重新分布产生了降低 Sn4+ 缺陷密度和背景空穴密度的综合效应，从而使器件的开路电压、短路电流和功率转换效率得到改善。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.