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

IF 18.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2024-12-17 DOI:10.1021/acsenergylett.4c0274510.1021/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* and 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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抗溶剂处理对太阳能电池用2D/3D钙钛矿锡薄膜生长的影响

在制备钙钛矿薄膜时，采用抗溶剂处理来控制自旋镀膜过程中的晶粒生长。我们研究了广泛掺入的芳香烃和非质子醚，讨论了它们在2D/3D Sn钙钛矿（PEA0.2FA0.8SnI3）太阳能电池中性能差异的来源。在我们筛选的反溶剂中，二异丙醚在太阳能电池中产生最高的功率转换效率。我们使用光学和结构表征技术的组合来揭示这种改进的性能源于更高浓度的2D相，均匀分布在整个2D/3D锡钙钛矿薄膜中，从而导致更好的结晶度。由于二异丙醚抗溶剂处理，2D相的重新分布具有降低Sn4+缺陷密度和背景空穴密度的综合作用，从而提高器件的开路电压、短路电流和功率转换效率。

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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.