journal article·2020-11-13

Deciphering the Role of Chalcogen-Containing Heterocycles in Nonfullerene Acceptors for Organic Solar Cells

Gaoda Chai, Jianquan Zhang, Mingao Pan, Zhen Wang, Jianwei Yu, Jiaen Liang, Han Yu, Yuzhong Chen, Ao Shang, Xiyuan Liu, Fujin Bai, Ruijie Ma, Yuan Chang, Siwei Luo, Anping Zeng, Hang Zhou, Kai Chen, Feng Gao, Harald Ade, He Yan

ACS Energy Letters· Volume 5· Issue 11
Publisher page

Abstract

The field of organic solar cells has experienced paradigm-shifting changes in recent years because of the emergence of nonfullerene acceptors (NFAs). It is critically important to gain more insight into the structure–property relationship of the emerging A′-DAD-A′-type NFAs. In this Letter, a family of NFAs named BPF-4F, BPT-4F, and BPS-4F incorporating various chalcogen-containing heterocycles, i.e., furan, thiophene, and selenophene, respectively, was designed and synthesized. These NFAs exhibited dramatic differences in their photovoltaic performances with device efficiencies of 16.8% achieved by the thiophene-based cells, which was much higher than the furan-based ones (12.6%). In addition, the selenophene-based NFA showed a red-shifted absorption relative to the furan- and thiophene-based ones and obtained a decent efficiency of 16.3% owing to an improved JSC. The reasons why these NFAs performed differently are systematically studied by comparing their optoelectronic properties and film morphology, which provides new understandings of the molecular design of high-performance NFAs.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Semiconductor materials and interfaces

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

Hong Kong University of Science and Technology-Shenzhen Research Institute, No. 9, Yuexing First Road, Hi-tech Park, Nanshan, Shenzhen 518057, China

Department of Physics and Organic and Carbon Electronics Laboratory (ORaCEL), North Carolina State University, Raleigh, North Carolina 27695, United States

Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping 58183, Sweden

School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen 518055, China

College of Pharmacy, Xi’an Jiaotong University, No.76 Yanta West Road, Xi’an, Shaanxi Province 710061, China

Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China

Funding

Research Grants Council, University Grants Committee · Ministry of Science and Technology of the People's Republic of China · Basic Energy Sciences · Shenzhen Science and Technology Innovation Commission · Office of Naval Research · Innovation and Technology Commission · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province

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