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A Difluoro-Methoxylated Ending-Group Asymmetric Small Molecule Acceptor Lead Efficient Binary Organic Photovoltaic Blend.
Wu, Weiwei; Zou, Bosen; Ma, Ruijie; Yao, Jia; Li, Chunliang; Luo, Zhenghui; Xie, Bomin; Qammar, Memoona; Dela Peña, Top Archie; Li, Mingjie; Wu, Jiaying; Yang, Chuluo; Fan, Qunping; Ma, Wei; Li, Gang; Yan, He.
  • Wu W; 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, 999077, P. R. China.
  • Zou B; 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, 999077, P. R. China.
  • Ma R; Department of Electrical and Electronic Engineering, Research Institute for Smart Energy (RISE), Photonic Research Institute (PRI), The Hong Kong Polytechnic University, Hong Kong, 999077, P. R. China.
  • Yao J; 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, 999077, P. R. China.
  • Li C; 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, 999077, P. R. China.
  • Luo Z; Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, Shenzhen Key Laboratory of New Information Display and Storage Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
  • Xie B; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
  • Qammar M; Department of Chemistry, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay Rd, Kowloon, Hong Kong, 999077, P. R. China.
  • Dela Peña TA; 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, 999077, P. R. China.
  • Li M; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, 999077, P. R. China.
  • Wu J; Function Hub, Advanced Materials Thrust, The Hong Kong University of Science and Technology, Nansha, Guangzhou, 511400, P. R. China.
  • Yang C; Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, 999077, P. R. China.
  • Fan Q; Function Hub, Advanced Materials Thrust, The Hong Kong University of Science and Technology, Nansha, Guangzhou, 511400, P. R. China.
  • Ma W; Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, Shenzhen Key Laboratory of New Information Display and Storage Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
  • Li G; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
  • Yan H; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
Small ; : e2402793, 2024 May 16.
Article en En | MEDLINE | ID: mdl-38757420
ABSTRACT
Developing a new end group for synthesizing asymmetric small molecule acceptors (SMAs) is crucial for achieving high-performance organic photovoltaics (OPVs). Herein, an asymmetric small molecule acceptor, BTP-BO-4FO, featuring a new difluoro-methoxylated end-group is reported. Compared to its symmetric counterpart L8-BO, BTP-BO-4FO exhibits an upshifted energy level, larger dipole moment, and more sequential crystallinity. By adopting two representative and widely available solvent additives (1-chloronaphthalene (CN) and 1,8-diiodooctane (DIO)), the device based on PM6BTP-BO-4FO (CN) photovoltaic blend demonstrates a power conversion efficiency (PCE) of 18.62% with an excellent open-circuit voltage (VOC) of 0.933 V, which surpasses the optimal result of L8-BO. The PCE of 18.62% realizes the best efficiencies for binary OPVs based on SMAs with asymmetric end groups. A series of investigations reveal that optimized PM6BTP-BO-4FO film demonstrates similar molecular packing motif and fibrillar phase distribution as PM6L8-BO (DIO) does, resulting in comparable recombination dynamics, thus, similar fill factor. Besides, it is found PM6BTP-BO-4FO possesses more efficient charge generation, which yields better VOC-JSC balance. This study provides a new ending group that enables a cutting-edge efficiency in asymmetric SMA-based OPVs, enriching the material library and shed light on further design ideas.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2024 Tipo del documento: Article
Texto completo
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PubMed Links
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2024 Tipo del documento: Article