journal article·2023-05

Diffusion‐Limited Accepter Alloy Enables Highly Efficient and Stable Organic Solar Cells

Cen Zhang, Ming Zhang, Qiuju Zhou, Shanshan Chen, Seoyoung Kim, Jia Yao, Ze Zhang, Yang Bai, Qi Chen, Bowen Chang, Hongyuan Fu, Lingwei Xue, Haiqiao Wang, Changduk Yang, Zhi‐Guo Zhang

Advanced Functional Materials· Volume 33· Issue 18
Publisher page

Abstract

Abstract Organic solar cells (OSCs) are designed based on a blend of polymer donor and small molecular acceptor whereby the thermodynamic relaxation of the morphology raises the concerns related to operational stability. Herein, it is demonstrated that the classical Y6‐based binary device can be stabilized by using its derivative of ZCCF3 as the third component, which is designed with the replacing of the thiadiazole group on Y6 with the trifluoromethyl substituted diazepine unit. ZCCF3 delivers not only higher glass transition temperature (Tg) than Y6 but also have hyper‐miscibility with Y6, contributing to a favorable diffusion‐limited Y6:ZCCF3 alloy when blended with polymer donor. Consequently, a champion power conversion efficiency of 18.54% is achieved in the optimal PM6: Y6: ZCCF3 devices, which can retain their 80% initial efficiency of up to 360 h. This study highlights the importance of high Tg of the third component and its derived hyper‐miscible accepter alloys in achieving highly efficient and stable OSCs.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China

Analysis & Testing Center Xinyang Normal University Xinyang Henan 464000 China

MOE Key Laboratory of Low‐grade Energy Utilization Technologies and Systems CQU‐NUS Renewable Energy Materials & Devices Joint Laboratory School of Energy & Power Engineering Chongqing University Chongqing 400044 China

Department of Energy Engineering School of Energy and Chemical Engineering Low Dimensional Carbon Materials Center Ulsan National Institute of Science and Technology (UNIST) Ulsan 689‐798 South Korea

Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers Beijing University of Chemical Technology Beijing 100029 China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · National Research Foundation of Korea

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