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Zou B, Wu W, Dela Peña TA, Ma R, Luo Y, Hai Y, Xie X, Li M, Luo Z, Wu J, Yang C, Li G, Yan H. Step-by-Step Modulation of Crystalline Features and Exciton Kinetics for 19.2% Efficiency Ortho-Xylene Processed Organic Solar Cells. Nanomicro Lett 2023; 16:30. [PMID: 37995001 PMCID: PMC10667184 DOI: 10.1007/s40820-023-01241-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/06/2023] [Indexed: 11/24/2023]
Abstract
With plenty of popular and effective ternary organic solar cells (OSCs) construction strategies proposed and applied, its power conversion efficiencies (PCEs) have come to a new level of over 19% in single-junction devices. However, previous studies are heavily based in chloroform (CF) leaving behind substantial knowledge deficiencies in understanding the influence of solvent choice when introducing a third component. Herein, we present a case where a newly designed asymmetric small molecular acceptor using fluoro-methoxylated end-group modification strategy, named BTP-BO-3FO with enlarged bandgap, brings different morphological evolution and performance improvement effect on host system PM6:BTP-eC9, processed by CF and ortho-xylene (o-XY). With detailed analyses supported by a series of experiments, the best PCE of 19.24% for green solvent-processed OSCs is found to be a fruit of finely tuned crystalline ordering and general aggregation motif, which furthermore nourishes a favorable charge generation and recombination behavior. Likewise, over 19% PCE can be achieved by replacing spin-coating with blade coating for active layer deposition. This work focuses on understanding the commonly met yet frequently ignored issues when building ternary blends to demonstrate cutting-edge device performance, hence, will be instructive to other ternary OSC works in the future.
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Affiliation(s)
- Bosen Zou
- Department of Chemistry Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People's Republic of China
| | - Weiwei Wu
- Department of Chemistry Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People's Republic of China
| | - Top Archie Dela Peña
- Department of Chemistry Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People's Republic of China
- The Hong Kong University of Science and Technology, Function Hub, Advanced Materials Thrust, NanshaGuangzhou, 511400, People's Republic of China
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China
| | - Ruijie Ma
- Department of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), Guangdong-Hong Kong-Macao (GHM) Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, People's Republic of China.
| | - Yongmin Luo
- The Hong Kong University of Science and Technology, Function Hub, Advanced Materials Thrust, NanshaGuangzhou, 511400, People's Republic of China
| | - Yulong Hai
- The Hong Kong University of Science and Technology, Function Hub, Advanced Materials Thrust, NanshaGuangzhou, 511400, People's Republic of China
| | - Xiyun Xie
- Department of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), Guangdong-Hong Kong-Macao (GHM) Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, People's Republic of China
| | - Mingjie Li
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China
| | - Zhenghui Luo
- Shenzhen Key Laboratory of New Information Display and Storage Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
| | - Jiaying Wu
- The Hong Kong University of Science and Technology, Function Hub, Advanced Materials Thrust, NanshaGuangzhou, 511400, People's Republic of China.
| | - Chuluo Yang
- Shenzhen Key Laboratory of New Information Display and Storage Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Gang Li
- Department of Chemistry Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People's Republic of China
| | - He Yan
- Department of Chemistry Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People's Republic of China.
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