Amino acid functionalised perylene bisimides for aqueous solution-deposited electron transporting interlayers in organic photovoltaic devices
Amino acid functionalised perylene bisimides for aqueous solution-deposited electron transporting interlayers in organic photovoltaic devices
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DOI：
10.1039/d1tc04622e
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发表时间：
2022-02-21
影响因子：
6.4
通讯作者：
Draper, Emily R.
中科院分区：
文献类型：
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作者：
Cameron, Joseph;Adams, Dave J.;Draper, Emily R.
可溶液加工的有机太阳能电池具有以低能量密集加工提供低成本可再生能源的潜力。然而，由于需要正交处理以避免层的溶解，因此对于形成超出本体异质结层的多层光伏器件相容的材料的范围是有限的。改善电荷传输是追求高效有机光致发光的关键挑战。因此，开发适用于正交加工的可溶液加工的电子传输层对于溶液加工器件的可行性是重要的。本文介绍了一系列氨基酸修饰的苝酰亚胺（PBIs）作为P3 HT/PC61 BM有机光伏电池的电子传输中间层。这些I3 BI在高pH下容易溶于水，从而允许容易的溶液加工性。尽管在PBI系列中分子结构的变化很小，但太阳能电池的性能存在深刻的差异，其中苯丙氨酸衍生物显示出最有前途的性能。PBIs的吸光度、形貌和光电导特性对材料作为有效中间层的适用性有很大影响。
Solution-processable organic solar cells have the potential to offer a low-cost renewable energy source with low energy intensive processing. However, the range of materials that are compatible for forming multilayer photovoltaic devices beyond a bulk heterojunction layer is limited due to a requirement for orthogonal processing to avoid dissolution of layers. Improving charge transport is a key challenge in the pursuit of high efficiency organic photovoltaics. Therefore, the development of solution-processable electron transport layers that are suitable for orthogonal processing is important for the feasibility of solution-processed devices. Here, we present a series of amino acid appended perylene bisimides (PBIs) which have been used as electron transporting interlayers in P3HT/PC61BM based organic photovoltaic cells. These PBIs are easily soluble in water at high pH, allowing for easy solution processability. Despite minimal changes in molecular structure in the series of PBIs, there are profound differences in performance of the solar cells, with the phenylalanine derivative showing the most promising performance. The absorbance, morphology and photoconductivity properties of the PBIs have a strong influence on the suitability of the material as an effective interlayer.