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Li Y, Ge Z, Mei L, Ma H, Chen Y, Wang X, Yu J, Lu G, Yang R, Chen XK, Yin S, Sun Y. Isomeric Dimer Acceptors for Stable Organic Solar Cells with over 19 % Efficiency. Angew Chem Int Ed Engl 2024:e202411044. [PMID: 39235423 DOI: 10.1002/anie.202411044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/18/2024] [Accepted: 09/04/2024] [Indexed: 09/06/2024]
Abstract
The strategy of isomerization is known for its simple yet effective role in optimizing molecular configuration and enhancing the power conversion efficiency (PCE) of organic solar cells (OSCs). However, the impact of isomerization on the design of dimer acceptors has been rarely investigated, and the relationship between the chemical structure and optoelectronic property remains unclear. In this study, we designed and synthesized two dimer acceptor isomers named D-TPh and D-TN, which differ in the positional arrangement of their end capping groups. Compared to D-TN, D-TPh exhibited enhanced backbone planarity, elevated lowest unoccupied molecular orbital energy level, and more ordered molecular stacking. Consequently, the OSC device based on PM6 : D-TPh achieved a PCE of 19.05 %, higher than that (PCE=18.42 %) of the device based on PM6 : D-TN. Large-area PM6 : D-TPh devices (1 cm2) yielded a PCE of 18.00 %. More importantly, the extrapolated T80 lifetime of the PM6 : D-TPh device is over 2800 h with MPP tracking under continuous one-sun illumination. These results suggest that isomerization strategy is an effective way to optimize the molecular configuration of dimer acceptors for the fabrication of high-efficiency and stable OSCs.
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Affiliation(s)
- Yun Li
- Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education, College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, P. R. China
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Zhongwei Ge
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Le Mei
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, P. R. China
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, 999077, P. R. China
| | - Haisheng Ma
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Yue Chen
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Xunchang Wang
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056, P. R. China
| | - Jifa Yu
- Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China
| | - Guanghao Lu
- Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China
| | - Renqiang Yang
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056, P. R. China
| | - Xian-Kai Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, P. R. China
| | - Shouchun Yin
- Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education, College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, P. R. China
| | - Yanming Sun
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
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Li Q, Wu J, Guo Q, Qin L, Xue L, Geng Y, Li X, Zhang ZG, Yan Q, Zhou E. Effect of Number and Position of Chlorine Atoms on the Photovoltaic Performance of Asymmetric Nonfullerene Acceptors. ACS APPLIED MATERIALS & INTERFACES 2024; 16:3755-3763. [PMID: 38190611 DOI: 10.1021/acsami.3c15518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
It has been well proved that the introduction of halogen can effectively modify the optoelectronic properties of classic symmetric nonfullerene acceptors (NFAs). However, the relevant studies for asymmetric NFAs are limited, especially the effect of halogen substitution number and position on the photovoltaic performance is not clear. In this work, four asymmetric NFAs with A-D-A1-A2 structure are developed by tuning the number and position of chlorine atoms on the 1,1-dicyanomethylene-3-indanone end groups, namely, A303, A304, A305, and A306. The related NFAs show progressively deeper energy levels and red-shifted absorption spectra as the degree of chlorination increases. The PM6:A306-constructed organic solar cells (OSCs) give a champion power conversion efficiency (PCE) of 13.03%. This is mainly ascribed to the most efficient exciton dissociation and collection, suppressed charge recombination, and optimal morphology. Moreover, by alternating the substitution position, the PM6:A305-based device yielded a higher PCE of 12.53% than that of PM6:A304 (12.05%). This work offers fresh insights into establishing excellent asymmetric NFAs for OSCs.
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Affiliation(s)
- Qingbin Li
- Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
- School of Chemical and Environmental Engineering, Pingdingshan University, Pingdingshan, Henan 467000, China
| | - Jiang Wu
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450003, China
| | - Qing Guo
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450003, China
| | - Linjiao Qin
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450003, China
| | - Lingwei Xue
- School of Chemical and Environmental Engineering, Pingdingshan University, Pingdingshan, Henan 467000, China
| | - Yanfang Geng
- National Center for Nanoscience and Technology, Beijing 100190, China
| | - Xiangyu Li
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450003, China
| | - Zhi-Guo Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Qingzhi Yan
- Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Erjun Zhou
- National Center for Nanoscience and Technology, Beijing 100190, China
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