journal article·2022-09Open access

The Crystalline Behavior and Device Function of Nonfullerene Acceptors in Organic Solar Cells

Jinqiu Xu, Francis Lin, Lei Zhu, Ming Zhang, Tianyu Hao, Guanqing Zhou, Ke Gao, Yecheng Zou, Gang Wei, Yuanping Yi, Alex K.‐Y. Jen, Yongming Zhang, Feng Liu

Advanced Energy Materials· Volume 12· Issue 34

Abstract

Abstract The current research investigates the structure features and intermolecular interactions of nonfullerene acceptors (NFAs) in single crystal and thin films, as well as their solar cell applications. Guiding parameters and key intermolecular forces that lead to 2D brickwork or 3D web packing are identified. The atomic modification is shown as the key to induce hydrogen bonding or π–π stacking column, which results in different crystalline packing. The molecular assembly in thin film is initiated by hydrogen bonding, and completed by π–π stacking reorganization. The packing energy is seen as a guiding parameter that dictates the NFA crystalline morphology in blended thin films. The crystalline packing motif is not directly related with device efficiency. However, the crystalline morphology is the key parameter to influence exciton/carrier dynamics and device performance. A broader picture on the scaling behavior of organic semiconductor crystals ranging from oligoacenes to NFAs is established.
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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

Frontiers Science Center for Transformative Molecules Center of Hydrogen Science and in situ Center for Physical Sciences School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China

Department of Materials Science and Engineering and Department of Chemistry University of Washington Seattle WA 98195 USA

Department of Chemistry City University of Hong Kong Kowloon Hong Kong 999077 P. R. China

Science Center for Material Creation and Energy Conversion Institute of Frontier and Interdisciplinary Science Shandong University Qingdao 266237 P. R. China

State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company Zibo City Shandong Province 256401 P. R. China

Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

Funding

National Natural Science Foundation of China · Office of Naval Research · Natural Science Foundation of Shandong Province · U.S. Department of Energy · Office of Science

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