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Title: Synergistic Effect of Chlorination and Selenophene: Achieving Elevated Solar Conversion in Highly Aggregated Systems

Abstract

Chlorination and selenophene were used to develop benzothiadiazole-based polymers for high-performance polymer solar cells (PSCs). The introduction of selenophene can increase crystallinity due to the metalloid nature of selenium and thus facilitate charge transport. Chlorination can tune the energy levels and induce strong aggregation due to its unique features. A non-chlorinated polymer with selenophene, PBT3TSe, shows a highly crystalline structure and a dominant face-on orientation, consequently attaining a high short-circuit current (J(SC)). Chlorinated PBT3TClSe displays synergy between the advantages of chlorination and selenophene to achieve elevated photovoltaic performance, with a power conversion efficiency (PCE) approaching 9.89% in PC 71BM-based devices. Interestingly, chlorination has an important influence on morphology of the polymer and polymer blend films, resulting in a severe aggregation and mixed face-on and edge-on orientation in the blend film. But the sufficient intermingling of donor and acceptor and the closer distances between molecules from the introduction of the chlorine and selenophene offset their morphological inferiority to achieve higher solar conversion.

Authors:
 [1];  [1];  [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [1]
  1. Southern Univ. of Science and Technology, Shenzhen (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Univ. of Chicago, IL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Natural Science Foundation of China (NNSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1506671
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Macromolecules
Additional Journal Information:
Journal Volume: 52; Journal Issue: 6; Journal ID: ISSN 0024-9297
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY

Citation Formats

Zhong, Xiaowei, Chen, Hui, Wang, Meijing, Gan, Shenglong, He, Qiming, Chen, Wei, and He, Feng. Synergistic Effect of Chlorination and Selenophene: Achieving Elevated Solar Conversion in Highly Aggregated Systems. United States: N. p., 2019. Web. doi:10.1021/acs.macromol.8b02445.
Zhong, Xiaowei, Chen, Hui, Wang, Meijing, Gan, Shenglong, He, Qiming, Chen, Wei, & He, Feng. Synergistic Effect of Chlorination and Selenophene: Achieving Elevated Solar Conversion in Highly Aggregated Systems. United States. doi:10.1021/acs.macromol.8b02445.
Zhong, Xiaowei, Chen, Hui, Wang, Meijing, Gan, Shenglong, He, Qiming, Chen, Wei, and He, Feng. Tue . "Synergistic Effect of Chlorination and Selenophene: Achieving Elevated Solar Conversion in Highly Aggregated Systems". United States. doi:10.1021/acs.macromol.8b02445.
@article{osti_1506671,
title = {Synergistic Effect of Chlorination and Selenophene: Achieving Elevated Solar Conversion in Highly Aggregated Systems},
author = {Zhong, Xiaowei and Chen, Hui and Wang, Meijing and Gan, Shenglong and He, Qiming and Chen, Wei and He, Feng},
abstractNote = {Chlorination and selenophene were used to develop benzothiadiazole-based polymers for high-performance polymer solar cells (PSCs). The introduction of selenophene can increase crystallinity due to the metalloid nature of selenium and thus facilitate charge transport. Chlorination can tune the energy levels and induce strong aggregation due to its unique features. A non-chlorinated polymer with selenophene, PBT3TSe, shows a highly crystalline structure and a dominant face-on orientation, consequently attaining a high short-circuit current (J(SC)). Chlorinated PBT3TClSe displays synergy between the advantages of chlorination and selenophene to achieve elevated photovoltaic performance, with a power conversion efficiency (PCE) approaching 9.89% in PC71BM-based devices. Interestingly, chlorination has an important influence on morphology of the polymer and polymer blend films, resulting in a severe aggregation and mixed face-on and edge-on orientation in the blend film. But the sufficient intermingling of donor and acceptor and the closer distances between molecules from the introduction of the chlorine and selenophene offset their morphological inferiority to achieve higher solar conversion.},
doi = {10.1021/acs.macromol.8b02445},
journal = {Macromolecules},
number = 6,
volume = 52,
place = {United States},
year = {2019},
month = {3}
}

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This content will become publicly available on March 12, 2020
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