Multi‐Trifluoromethylated Benzotriazole‐Based Acceptor: Induced Molecular Orderly Packing Achieving High‐Performance Planar‐Mixed Heterojunction Organic Photovoltaics

IF 18.5 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Mei Luo, Siyu Zhao, Lingchen Kong, Jifa Wu, Mingqing Chen, Zesheng Zhang, Xuanchen Liu, Peng Dou, Mingke Li, Lei Ying, Mengting Jiang, Zuodong Qin, Guokai Jia, Junwu Chen
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引用次数: 0

Abstract

In planar‐mixed heterojunction organic solar cells (PMHJ‐OSCs), efficient exciton utilization remains a significant challenge due to the limited diffusion distance of excitons. Achieving an optimized morphology in the active layer is essential for facilitating both exciton diffusion and charge carrier transport. In this work, the challenge is addressed by employing a dual strategy involving the development of a novel acceptor BTz‐CF3 and ternary PMHJ blending. By mixing BTz‐CF3 in the acceptor L8‐BO layer, PMHJ‐OSCs based on D18/L8‐BO:BTz‐CF3 with a more ideal vertical phase separation showed an efficiency of 18.6%, higher than that of 18.2% for the D18/L8‐BO control system. Interestingly, introducing BTz‐CF3 in the donor D18 layer could facilitate the penetration of L8‐BO into the donor layer while simultaneously induced the L8‐BO orderly stacking within the upper layer, showing a unique advantage in constructing improved morphology in the PMHJ active layer. As a result, the D18:BTz‐CF3/L8‐BO PMHJ‐device achieved an excellent efficiency of 19.5%. This work demonstrates that the strategy of incorporating a well‐miscible third component into the donor layer has great potential in fabricating efficient PMHJ OSCs by improving molecular stacking and vertical distribution.
基于多三氟甲基化苯并三唑的受体:诱导分子有序包装实现高性能平面混合异质结有机光伏
在平面混合异质结有机太阳能电池(PMHJ - OSCs)中,由于激子的扩散距离有限,有效利用激子仍然是一个重大挑战。在活性层中实现优化的形貌对于促进激子扩散和载流子输运都是必不可少的。在这项工作中,通过采用双重策略来解决这一挑战,包括开发一种新的受体BTz - CF3和三元PMHJ共混。通过在受体L8‐BO层中混合BTz‐CF3,基于D18/L8‐BO:BTz‐CF3的PMHJ‐OSCs具有更理想的垂直相分离效果,效率为18.6%,高于D18/L8‐BO控制系统的18.2%。有趣的是,在给体D18层中引入BTz‐CF3可以促进L8‐BO渗透到给体层中,同时诱导L8‐BO在上层有序堆积,在PMHJ活性层中构建改进的形态显示出独特的优势。结果表明,D18:BTz‐CF3/L8‐BO PMHJ‐器件的效率达到了19.5%。这项工作表明,通过改善分子堆积和垂直分布,在供体层中加入良好混溶的第三组分的策略在制造高效PMHJ OSCs方面具有很大的潜力。
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
Advanced Functional Materials
Advanced Functional Materials 工程技术-材料科学:综合
CiteScore
29.50
自引率
4.20%
发文量
2086
审稿时长
2.1 months
期刊介绍: Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.
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