Dimeric Acceptors Using Different Central Linkers to Manipulate Electronic and Morphological Properties

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2024-12-02 DOI:10.1002/aenm.202404567

Senke Tan, Rui Zeng, Jiawei Deng, Fei Han, Yi Lin, Fan Xu, Lixuan Kan, Zheng Tang, Yufei Gong, Ming Zhang, Lei Zhu, Guanqing Zhou, Xingyu Gao, Xiaojun Li, Xiaonan Xue, Hao Jing, Yongming Zhang, Shengjie Xu, Feng Liu

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Abstract

Dimerized acceptors show promise in combining the high performance of small‐molecule non‐fullerene acceptors (NFAs) with the excellent stability of polymer acceptors. The central linking units that connect two acceptor molecules together have a profound impact on dimeric acceptor properties and structure‐performance relationships in blended thin films. It is seen that different linkers significantly affect the electronic properties and morphology in blended thin film. The electron‐donating linker elevates the absorption coefficient, affords a lower bandgap, and reduces energy loss, and thus better photovoltaic device performance. Better fibrillar morphology can be obtained. The best material DY‐EDOT‐based device shows a power conversion efficiency (PCE) of 18.21%, an open‐circuit voltage (Voc) of 0.924 V, a short‐circuit current density (Jsc) of 25.20 mA cm−2, a fill factor (FF) of 78.19%, which is among the highest value for dimerized acceptors. This study reveals the fundamental importance of linker units in determining the dimerized acceptor properties and provides useful strategies for developing oligomeric and polymeric acceptors, which is critical in simultaneously improving the performance and stability of organic solar cells (OSCs).

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.