journal article·2024-01

Over 18% Efficiency Ternary Organic Solar Cells with 300 nm Thick Active Layer Enabled by an Oligomeric Acceptor

Yanan Wei, Yunhao Cai, Xiaobin Gu, Guo Yao, Zhen Fu, Yuxuan Zhu, Junfang Yang, Junpeng Dai, Jianqi Zhang, Xin Zhang, Xiaotao Hao, Guanghao Lu, Zheng Tang, Qian Peng, Chunfeng Zhang, Hui Huang

Advanced Materials· Volume 36· Issue 2
Publisher page

Abstract

Abstract The development of high‐efficiency thickness‐insensitive organic solar cells (OSCs) is crucially important for the mass production of solar panels. However, increasing the active layer thickness usually induces a substantial loss in efficiency. Herein, a ternary strategy in which an oligomer DY‐TF is incorporated into PM6:L8‐BO system as a guest component is adopted to break this dilemma. The S···F intramolecular noncovalent interactions in the backbone endow DY‐TF with a high planarity. Upon the addition of DY‐TF, the crystallinity of the blend is effectively improved, leading to increased charge carrier mobility, which is highly desirable in the fabrication of thick‐film devices. As a result, thin‐film PM6:L8‐BO:DY‐TF‐based device (110 nm) shows a power conversion efficiency (PCE) of 19.13%. Impressively, when the active layer thickness increases to 300 nm, an efficiency of 18.23% (certified as 17.8%) is achieved, representing the highest efficiency reported for 300 nm thick OSCs thus far. Additionally, blade‐coated thick device (300 nm) delivers a promising PCE of 17.38%. This work brings new insights into the construction of efficient OSCs with high thickness tolerance, showing great potential for roll‐to‐roll printing of large‐area solar cells.
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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

College of Materials Science and Opto‐Electronic Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China

National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center for Advanced Microstructures Nanjing University Nanjing 210093 P. R. China

School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan Shandong 250100 P. R. China

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low‐Dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China

School of Chemical Sciences University of the Chinese Academy of Sciences Beijing 100049 P. R. China

Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an 710054 China

Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology Beijing 100190 P. R. China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences · Fundamental Research Funds for the Central Universities · University of Chinese Academy of Sciences

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