DataVXACS Energy LettersPaper
journal article·2017-04-14Open access

Design and Synthesis of Chlorinated Benzothiadiazole-Based Polymers for Efficient Solar Energy Conversion

Zhiming Hu, Hui Chen, Jianfei Qu, Xiaowei Zhong, Pengjie Chao, Mo Xie, Wei Lu, Anhua Liu, Leilei Tian, Yu-An Su, Wei Chen, Feng He

ACS Energy Letters· Volume 2· Issue 4
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Source abstract

Abstract

Chlorinated benzothiadiazole-based polymers with multiple chlorine atoms were designed and synthesized for polymer solar cells to achieve enhanced open-circuit voltage and improved power conversion efficiency. Chlorine substitution was found to affect molecular orientation, increase crystallinity, and thereby alter band gap and charge transport properties. The one-chlorine-substituted PCBT4T-2OD exhibited a larger portion of “face-on” orientation than that of other two polymers, nonchlorinated PBT4T-2OD and two-chlorine-substituted PCCBT4T-2OD, in the polymer:PC 71 BM blended films. PCBT4T-2OD also showed the largest crystallite sizes in those three polymers. The improved molecular orientation and larger crystallite sizes would definitely facilitate the charge transport in the active layer and enhance the performance of corresponding polymer solar cells. The highest power conversion efficiency of 8.21% with PC 71 BM was achieved in the photovoltaic device of PCBT4T-2OD . It is approximately 68% higher than that of the nonchlorine analog.
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Research context

PolymersElectronic materials

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications

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

Affiliations

Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, PR China

Advanced Materials Laboratory, Key Laboratory of High Performance Ceramic Fibers of Ministry of Education, College of Materials, Xiamen University, Xiamen 361005, China

Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen 518055, PR China

Materials Science Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, Illinois 60439, United States

Institute for Molecular Engineering, The University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, United States

Funding

Ministry of Science and Technology of the People's Republic of China · Office of Science · Shenzhen Science and Technology Innovation Committee · Shenzhen Municipality · Shenzhen Key Lab

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