Self-Assembled Multilayers Reduce Interfacial Energy Loss in Perovskite Solar Cells

IF 18.1 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2026-08-08 DOI:10.1038/s41467-026-76497-1

Yi Pan, Lei Liu, Haoxuan Guo, Changqin Lin, Pengfei Wu, Zeping Ou, Can Wang, Peidong Chen, Qin Gao, Mingyang Gao, Xiaoxue Lin, Dingqin Hu, Tingming Jiang, Yujie Zheng, Zeyun Xiao, Ke Yang, Zeyu Zhang, Rui Wang, Nabonswende Aida Nadege Ouedraogo, Zedong Lin, Wei Wei, Kuan Sun, Qiang Liao

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引用次数: 0

Abstract

The use of self-assembled multilayer (SAM) layers as hole transport layers (HTLs) represents a major advance for high-efficiency perovskite solar cells (PSCs). However, many SAMs materials suffer from aggregation, poor wettability, and weak interactions with the perovskite, which hinder charge transfer and cause energy losses that limit both power conversion efficiency (PCE) and long-term stability. In this study, we synthesized two SAMs, namely 2-(10-(3,5-dimethoxyphenyl)−7H-benzo[c]carbazol-7-yl)ethyl)phosphonic acid (denoted as DMPA) and 2-(7H-benzo[c]carbazol-7-yl)ethyl)phosphonic acid (denoted as BCPA). DMPA SAM effectively suppresses self‑aggregation and enhances substrate coverage. The methoxy groups in DMPA interact with the perovskite, thereby enabling DMPA to passivate defects at the buried interface and optimize perovskite crystallization. These interfacial improvements facilitate more efficient charge extraction and enhance interfacial stability. As a result, DMPA-based PSCs achieve a PCE of 27.59% (certified PCE of 27.2%) and show remarkable photothermal stability, retaining 94.5% of their initial efficiency after 1600 hours of continuous illumination under 1 Sun at 65 °C.

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自组装多层膜减少钙钛矿太阳能电池的界面能量损失

自组装多层（SAM）层作为空穴传输层（HTLs）的使用代表了高效钙钛矿太阳能电池（PSCs）的重大进展。然而，许多SAMs材料存在聚集性、润湿性差以及与钙钛矿相互作用弱的问题，这些问题阻碍了电荷转移并导致能量损失，从而限制了功率转换效率（PCE）和长期稳定性。在本研究中，我们合成了2-（10-（3,5-二甲氧基苯基）−7h -苯并[c]咔唑-7-基）乙基)膦酸（记为DMPA）和2-（7h -苯并[c]咔唑-7-基）乙基)膦酸（记为BCPA）。DMPA SAM有效地抑制了自聚集，提高了衬底覆盖率。DMPA中的甲氧基与钙钛矿相互作用，从而使DMPA钝化埋藏界面处的缺陷，优化钙钛矿结晶。这些界面改进有助于更有效地提取电荷并增强界面稳定性。结果，基于dmpa的PSCs的PCE达到27.59%（经认证的PCE为27.2%），并表现出显著的光热稳定性，在65°C的1个太阳下连续照明1600小时后，其初始效率仍保持94.5%。

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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.