Subtly Modulating Bay Sites of Perylene Diimide Cathode Interface Layer for High‐Performance and High‐Stability Non‐Fullerene Organic Solar Cells

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2024-12-26 DOI:10.1002/adfm.202419205

Senmei Lan, Dan Zhou, Lin Hu, Hongxiang Li, Yujie Pu, Fang Wang, Wentian Wan, Yongfen Tong, Ruizhi Lv, Haitao Xu, Bin Hu, Pei Cheng, Zaifang Li, Lie Chen

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Abstract

Cathode interface layers (CILs) are crucial for optimizing the power conversion efficiency (PCE) and stability of organic solar cells (OSCs). Two small molecule CILs, PDINN‐TS and PDINN‐BS are developed, by modifying the bay sites of perylene diimide (PDI) with thieno [3,2‐b] thiophene and 2,2′‐bithiophene, separately. Due to better electron‐donating capacity and longer conjugate length of the 2,2′‐bithiophene, PDINN‐BS exhibits a stronger self‐doping effect and superior interface compatibility compared to PDINN‐TS. Consequently, in PM6: Y6 OSCs, PDINN‐BS achieved an elevated PCE of 16.95%, surpassing PDINN‐TS of 16.66%. Meanwhile, PDINN‐BS exhibits excellent universality. When employing PM6: BTP‐eC9 and PM6:L8‐BO systems, PDINN‐BS‐based device yielded PCE of 18.02% and 18.95%, outperforming PDINN‐TS of 17.51% and 18.38%, respectively. Furthermore, stability tests revealed that after being stored in the glovebox for 1500 h, PDINN‐BS retained 90% of its pristine PCE, compared to 86% for PDINN‐TS. PDINN‐BS showed longer 80% PCE decay (T80) of 150 h in air, 200 h at 70 °C heating in N2, and 500 h under 1 sun immersion, surpassing PDINN‐TS with 120, 130, and 380 h, respectively. This demonstrates that PDINN‐BS displayed superior stability under a complicated environment. Consequently, this study provides significative guidance for the exploitation of high‐performance and high‐stability OSCs.

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高性能、高稳定性非富勒烯有机太阳能电池中苝二亚胺阴极界面层的精细调制

阴极界面层（CILs）是优化有机太阳能电池（OSCs）功率转换效率和稳定性的关键。用噻吩[3,2‐b]和2,2′‐二噻吩分别修饰苝酰二亚胺（PDI）的港湾位，制备了PDINN‐TS和PDINN‐BS两种小分子CILs。由于2,2′-二噻吩具有更好的供电子能力和更长的共轭长度，与PDINN - TS相比，PDINN - BS具有更强的自掺杂效应和更好的界面相容性。因此，在PM6: Y6 OSCs中，PDINN‐BS达到了16.95%的PCE升高，超过了PDINN‐TS的16.66%。同时，PDINN‐BS具有良好的通用性。当采用PM6: BTP - eC9和PM6:L8 - BO系统时，PDINN - BS - based器件的PCE分别为18.02%和18.95%，优于PDINN - TS的17.51%和18.38%。此外，稳定性测试显示，在手套箱中储存1500小时后，PDINN‐BS保留了90%的原始PCE，而PDINN‐TS则为86%。PDINN‐BS的80% PCE衰减（T80）更长，在空气中为150小时，在N2中加热200小时，在1个太阳下浸泡500小时，分别超过PDINN‐TS的120、130和380小时。这表明PDINN‐BS在复杂环境下表现出优越的稳定性。因此，本研究为开发高性能、高稳定性的osc提供了有意义的指导。

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 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.