A Chlorinated Donor Polymer Achieving High‐Performance Organic Solar Cells with a Wide Range of Polymer Molecular Weight

Zeng, Anping; Ma, Xiaoling; Pan, Mingao; Chen, Yuzhong; Ma, Ruijie; Zhao, Heng; Zhang, Jianquan; Kim, Ha Kyung; Shang, Ao; Luo, Siwei; Angunawela, Indunil Chathurangani; Chang, Yuan; Qi, Zhenyu; Sun, Huiliang; Lai, Joshua Yuk Lin; Ade, Harald; Ma, Wei; Zhang, Fujun; Yan, He

doi:10.1002/adfm.202102413

Title: A Chlorinated Donor Polymer Achieving High‐Performance Organic Solar Cells with a Wide Range of Polymer Molecular Weight

Journal Article · 16 June 2021 · Advanced Functional Materials

DOI: https://doi.org/10.1002/adfm.202102413 · OSTI ID:1797345

Zeng, Anping ^[1]; Ma, Xiaoling ^[2]; Pan, Mingao ^[1]; Chen, Yuzhong ^[1]; Ma, Ruijie ^[1]; Zhao, Heng ^[3]; Zhang, Jianquan ^[1]; Kim, Ha Kyung ^[1]; Shang, Ao ^[1]; Luo, Siwei ^[1]; Angunawela, Indunil Chathurangani ^[4]; Chang, Yuan ^[1]; Qi, Zhenyu ^[1]; Sun, Huiliang ^[5]; Lai, Joshua Yuk Lin ^[1]; Ade, Harald ^[4]; Ma, Wei ^[3]; Zhang, Fujun ^[2];

^[6]

Department of Chemistry Guangdong‐Hong Kong‐Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR 999077 P. R. China, HKUST‐Shenzhen Research Institute No. 9 Yuexing 1st Road, Hi‐tech Park, Nanshan Shenzhen 518057 P. R. China
Key Laboratory of Luminescence and Optical Information Ministry of Education Beijing Jiaotong University Beijing 100044 P. R. China
State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China
Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL) North Carolina State University Raleigh NC 27695 USA
Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics Southern University of Science and Technology (SUSTech) Xueyuan Road Shenzhen Guangdong 518055 P. R. China
Department of Chemistry Guangdong‐Hong Kong‐Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR 999077 P. R. China; HKUST‐Shenzhen Research Institute No. 9 Yuexing 1st Road; Hi‐tech Park; Nanshan Shenzhen 518057 P. R. China; Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 P. R. China

Abstract In the field of non‐fullerene organic solar cells (OSCs), compared to the rapid development of non‐fullerene acceptors, the progress of high‐performance donor polymers is relatively slow. The property and performance of donor polymers in OSCs are often sensitive to the molecular weight of the polymers. In this study, a chlorinated donor polymer named D18‐Cl is reported, which can achieve high performance with a wide range of polymer molecular weight. The devices based on D18‐Cl show a higher open‐circuit voltage ( V _OC ) due to the slightly deeper energy levels and an outstanding short‐circuit current density ( J _SC ) owing to the appropriate long periods of blend films and less ([6,6]‐phenyl‐C71‐butyric acid methyl ester) (PC ₇₁ BM) in mixed domains, leading to the higher efficiency of 17.97% than those of the D18‐based devices (17.21%). Meanwhile, D18‐Cl can achieve high efficiencies (17.30–17.97%) when its number‐averaged molecular weight ( M _n ) is ranged from 45 to 72 kDa. In contrast, the D18‐based devices only exhibit relatively high efficiencies in a narrow M _n range of ≈70 kDa. Such property and performance make D18‐Cl a promising donor polymer for scale‐up and low‐cost production.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1797345

Journal Information:: Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 33 Vol. 31; ISSN 1616-301X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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