Cathode interface materials based on perylene-diimide derivatives for thickness insensitivity and high fill factor heterojunction organic solar cells,Journal of Materials Chemistry A

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Cathode interface materials based on perylene-diimide derivatives for thickness insensitivity and high fill factor heterojunction organic solar cells
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-10-18 , DOI: 10.1039/d3ta04833k
Lei Li ₁ , Jie Xu ₁ , Wenli Luo ₁ , Ke Zhong ₁ , Xiaohong Zhao ₁ , Yu Hu ₁ , Zhongyi Yuan ₁ , Yiwang Chen ₁

Affiliation

Cathode interface layers are important to improve the performance of organic solar cells (OSCs). In this work, two perylene diimide (PDI) derivatives (2N-PDI and 2NBr-PDI) as cathode interface materials were reported. Studies of ultraviolet photoelectron spectroscopy (UPS), electron paramagnetic resonance (EPR), atomic force microscopy (AFM), electron mobility, and light intensity dependence were carried out. The results show that 2NBr-PDI has better metal electrode work function (WF) adjustability, film morphology, and electron mobility than PDINO. The device with 2NBr-PDI as the cathode interface layer with PM6:Y6 as the active layer reached a power conversion efficiency (PCE) of 16.18% and a high fill factor (FF) of 78.37%, which is one of the highest values among PM6:Y6 systems. Notably, it exhibits good thickness insensitivity, with PCE remaining at 90% at a thickness of 35 nm, which facilitates future large-scale production.

中文翻译：

基于苝二酰亚胺衍生物的阴极界面材料，用于厚度不敏感和高填充因子异质结有机太阳能电池

阴极界面层对于提高有机太阳能电池（OSC）的性能非常重要。在这项工作中，报道了两种苝二酰亚胺（PDI）衍生物（2N-PDI和2NBr-PDI ）作为阴极界面材料。进行了紫外光电子能谱（UPS）、电子顺磁共振（EPR）、原子力显微镜（AFM）、电子迁移率和光强度依赖性的研究。结果表明，2NBr-PDI比PDINO具有更好的金属电极功函数（WF）可调性、薄膜形貌和电子迁移率。以2NBr-PDI为阴极界面层、PM6:Y6为活性层的器件达到了16.18%的功率转换效率（PCE）和78.37%的高填充因子（FF），是目前同类器件中最高的值之一。 PM6:Y6 系统。值得注意的是，它表现出良好的厚度不敏感性，在35 nm厚度下PCE保持在90%，这有利于未来的大规模生产。

更新日期：2023-10-18

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