Moisture-Stable Intermediate Phase Manipulation for Efficient Perovskite Solar Cells Fabricated in Ambient Air

IF 18.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-09-28 DOI:10.1021/acsenergylett.5c02481

Luyao Yan, Hao Huang, Peng Cui, Yingying Yang, Zhenhuang Su, Yi Lu, Min Wang, Zhineng Lan, Shujie Qu, Benyu Liu, Changxu Sun, Liang Li, Shuxian Du, Fu Yang, Xingyu Gao, Meicheng Li

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Abstract

Fabricating high-efficiency perovskite solar cells (PSCs) in ambient air can facilitate their low-cost industrialization. However, the metastable wet-film stage before annealing during the film deposition process is susceptible to moisture invasion, making it difficult to form black-phase formamidinium lead iodide (α-FAPbI₃) perovskites in ambient air. Herein, we construct a moisture-stable intermediate phase dominated by δ-FAPbI₃ in the metastable wet-film stage using acetimidamidal acetate (AceAc). AceAc can induce the formation of δ-FAPbI₃ to resist the invasion of moisture on a wet film, further transforming the formed δ-FAPbI₃ into pure α-FAPbI₃ in the presence of MACl. The resulting PSCs fabricated in ambient air achieve a power conversion efficiency (PCE) of 26.5% (certified at 25.9%) and maintain 98% of the initial PCE after 11000 h of aging under air conditions (25% relative humidity (RH) and 25 °C).

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环境空气中高效钙钛矿太阳能电池的湿稳定中间相操作

在环境空气中制备高效钙钛矿太阳能电池（PSCs）可以促进其低成本产业化。然而，在薄膜沉积过程中，退火前的亚稳湿膜阶段易受水分侵入，在环境空气中难以形成黑相甲酰胺型碘化铅（α-FAPbI3）钙钛矿。本文利用醋酸乙酰胺（AceAc）在亚稳湿膜阶段构建了以δ-FAPbI3为主的湿稳定中间相。AceAc可以诱导δ-FAPbI3的形成，以抵抗湿膜上水分的侵入，在MACl存在下将形成的δ-FAPbI3进一步转化为纯α-FAPbI3。在环境空气中制造的PSCs实现了26.5%的功率转换效率（PCE）（认证为25.9%），并且在空气条件下（25%相对湿度（RH）和25°C）老化11000小时后保持了98%的初始PCE。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.