Complex formation of ferrocene derivatives with electron transport layers enables improved performance and photostability in organic solar cells

IF 35.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2025-09-05 DOI:10.1016/j.joule.2025.102107

Patipan Sukpoonprom, William D.J. Tremlett, Zhuoran Qiao, Chitsanucha Chattakoonpaisarn, Eunyoung Hong, Beier Hu, Karen Forberich, Jianhua Han, Junyi Wang, Somlak Ittisanronnachai, Longren Li, Francesco Vanin, Pichaya Pattanasattayavong, Zonglong Zhu, Artem Bakulin, Christoph J. Brabec, Derya Baran, Nicholas J. Long, Nicola Gasparini

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Abstract

Electron transport layers (ETLs), e.g., metal oxides, organic small molecules, or conjugated polymers, play a vital role in both performance and photo-thermal stability in organic solar cells (OSCs). Herein, we explored hybrid organic-inorganic electron transport materials by forming complexes between typical electron transport layers and ferrocene (Fc)-based molecules. Experimental and theoretical investigations revealed van der Waals interaction between the ETL and Fc compounds, which allows fine-tuning of the electrode work function to improve charge extraction properties and reduce trap-assisted recombination. As a result, OSCs showed improved fill factor (FF) and power conversion efficiency (PCE) for five donor-acceptor blends and three ETLs, with FF and PCE exceeding 80% and 20.1%, respectively. Finally, we demonstrated improved photostability for the hybrid ETLs with devices that retained 80% of their initial performance for 700 h when degraded under operating conditions (ISOS-L-1I).

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二茂铁衍生物与电子传递层的复合形成使有机太阳能电池的性能和光稳定性得到改善

电子传输层（etl），如金属氧化物、有机小分子或共轭聚合物，在有机太阳能电池（OSCs）的性能和光热稳定性中起着至关重要的作用。在此，我们通过在典型的电子传输层和二茂铁（Fc）基分子之间形成配合物来探索有机-无机杂化电子传输材料。实验和理论研究揭示了ETL和Fc化合物之间的范德华相互作用，这使得电极功函数可以微调以改善电荷提取性能并减少陷阱辅助重组。结果表明，五种供体-受体共混物和三种etl的填充因子（FF）和功率转换效率（PCE）均有所提高，其中FF和PCE分别超过80%和20.1%。最后，我们证明了混合etl的光稳定性得到了改善，该器件在工作条件下退化700小时后仍能保持其初始性能的80% （iso - l - 1i）。

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.