Strain Minimization via Dimyristoylphosphatidylcholine Modification for Perovskite Solar Cells

IF 17.5 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2026-10-09 Epub Date: 2026-09-29 DOI:10.1021/acsenergylett.6c02307

Tianyu Zhao, Yiyan Zhang, Shuaishuai Fang, Shengtao Zhang, Artem Kuklin, Hans Ågren, Guanying Chen

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Abstract

The stability of perovskite solar cells (PSCs) remains a major challenge, primarily due to strain-driven lattice degradation. Here, we introduce a strain minimization strategy using phosphatidylcholine to regulate the strain of perovskite films. We identify linear-shaped dimyristoylphosphatidylcholine (DMPC) as an ideal additive through dynamic stress relaxation within the perovskite lattice, minimizing the deformation ratio by 17-fold (from 0.34 to 0.02%) and increasing the ion-migration activation energy from 0.55 to 0.87 eV. Additionally, DMPC forms robust interfacial bonds with the perovskite, directing crystal growth and improving optoelectronic quality. As a result, DMPC-modified PSCs achieve a champion power conversion efficiency (PCE) of 26.61% and retain 91% of their initial efficiency after 300 temperature cycles (–40 to +85 °C), representing a 15-fold enhancement in T90 lifetime compared to control devices. This work establishes molecular-level strain engineering as an effective route to mitigate lattice stress and deliver thermally durable, high-efficiency perovskite photovoltaics.

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钙钛矿太阳能电池中二myristoyl磷脂酰胆碱改性的应变最小化

钙钛矿太阳能电池（PSCs）的稳定性仍然是一个主要的挑战，主要是由于应变驱动的晶格退化。本文介绍了一种利用磷脂酰胆碱调节钙钛矿薄膜应变的应变最小化策略。通过钙钛矿晶格内的动态应力松弛，我们发现线形二myristoylphosphatidylcholine （DMPC）是一种理想的添加剂，将变形率降低了17倍（从0.34降至0.02%），并将离子迁移活化能从0.55提高到0.87 eV。此外，DMPC与钙钛矿形成坚固的界面键，指导晶体生长并提高光电质量。因此，dmpc修饰的PSCs实现了26.61%的冠军功率转换效率（PCE），并在300个温度循环（-40至+85°C）后保持了91%的初始效率，与控制设备相比，T90寿命提高了15倍。这项工作建立了分子水平应变工程作为减轻晶格应力和提供热耐用、高效钙钛矿光伏的有效途径。

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.