High-performance indoor organic photovoltaics based on vertical acenaphthylene derivatives with halogen substitution: Suppressing energetic disorder and optimizing charge dynamics

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: R: Reports Pub Date : 2025-07-22 DOI:10.1016/j.mser.2025.101066

Shuai Xu , Hao Wang , Ruijie Ma , Jiaming Huang , Yang Xu , Pai Peng , Tengying Ma , Nan Ye , Baicheng Wang , Ninggui Ma , Youdi Zhang , Wei Gao , Xiaotian Hu , Gang Li , Yiwang Chen

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引用次数: 0

Abstract

Organic solar cells (OSCs) have shown great potential for indoor photovoltaic technology, owing to their advantages of strong light absorption characteristics, versatile color options and adjustable bandgap. However, substantial energetic disorder in active layer materials severely limits device performance under low-light conditions, presenting a major challenge for indoor photovoltaic applications. In this study, we have designed and synthesized four novel non-fullerene acceptors (NFAs) incorporating vertical acenaphthylene derivatives via halogen substitution strategies, namely GWQ20, Z3, Z4, and Z5, tailored specifically for indoor optoelectronic applications. Z3, Z4, and Z5 show much suppressed non-radiative energy loss and reduced energetic disorder but poor charge generation and recombination than GWQ20. Subsequently, for further device performance enhancement under indoor condition, it’s necessary to combine their distinct advantages via ternary strategy. As a result, target ternary devices based on Z4/Z5 both perform much better performance: 25.8 %/25.6 % vs 20.8 % under 1000 lux LED, and 30.1 %/30.2 % vs 26.8 % under 2000 lux LED, attributed to simultaneously minimized energy loss and protected charge behavior. These results are appealing the cutting-edge level of the field. Beyond efficiency, we herewith demonstrate that reducing energetic disorder is a key factor to improve the free carrier generation for indoor performance improvement, which could be instructive for future development of material design and device optimization on this type of OPVs.

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基于卤素取代的垂直苊衍生物的高性能室内有机光伏：抑制能量紊乱和优化电荷动力学

有机太阳能电池（OSCs）由于具有强的光吸收特性、多种颜色选择和可调的带隙等优点，在室内光伏技术中显示出巨大的潜力。然而，有源层材料中大量的能量紊乱严重限制了器件在低光条件下的性能，这对室内光伏应用提出了重大挑战。在这项研究中，我们设计并合成了四种新型的非富勒烯受体（nfa），通过卤素取代策略，包含垂直苊衍生物，即GWQ20， Z3， Z4和Z5，专门用于室内光电应用。与GWQ20相比，Z3、Z4和Z5的非辐射能量损失和能量无序程度明显降低，但电荷生成和复合能力较差。因此，为了进一步提高设备在室内条件下的性能，需要通过三元策略将它们各自的优势结合起来。结果，基于Z4/Z5的目标三元器件都表现出更好的性能：在1000勒克斯LED下，25.8 %/25.6 % vs 20.8 %，在2000勒克斯LED下，30.1 %/30.2 % vs 26.8 %，这归功于同时最小化的能量损失和保护电荷行为。这些结果吸引了该领域的尖端水平。除了效率之外，我们还证明了减少能量紊乱是改善室内性能的自由载流子产生的关键因素，这对未来该类型opv的材料设计和器件优化具有指导意义。

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

Materials Science and Engineering: R: Reports 工程技术-材料科学：综合

CiteScore

60.50

自引率

0.30%

发文量

审稿时长

34 days

期刊介绍： Materials Science & Engineering R: Reports is a journal that covers a wide range of topics in the field of materials science and engineering. It publishes both experimental and theoretical research papers, providing background information and critical assessments on various topics. The journal aims to publish high-quality and novel research papers and reviews. The subject areas covered by the journal include Materials Science (General), Electronic Materials, Optical Materials, and Magnetic Materials. In addition to regular issues, the journal also publishes special issues on key themes in the field of materials science, including Energy Materials, Materials for Health, Materials Discovery, Innovation for High Value Manufacturing, and Sustainable Materials development.