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Title: Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4- b ]thiophene Polymer Donor

Abstract

The chlorinated polymer, PBTCl, has been found to be an efficient donor in nonfullerene polymer solar cells (PSCs), which showed a blue-shifted absorbance compared to that of its fluorine analogue (PTB7-th) and resulted in more complementary light absorption with a nonfullerene acceptor, such as ITIC. Meanwhile, chlorine substitution lowered the HOMO level of PBTCl, which increased the open-circuit voltage of the corresponding polymer-based devices. The 2D GIWAXS analysis illustrated that the PBTCl/ITIC blend film exhibited a “face-on” orientation and scattering features of both PBTCl and ITIC, suggesting that the blend of PBTCl and ITIC was phase-separated and formed individual crystalline domains of the donor and acceptor, which promoted charge transfer in the bicontinuous film and eventually elevated the solar energy conversion efficiency. The PBTCl-based nonfullerene PSC exhibited a maximum PCE of 7.57% with a Voc of 0.91 V, which was an approximately 13% increasing in the PCE compared to that of the fluorine-analogue-based device.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People’s Republic of China
  2. 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
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; National Basic Research Program of China; South University of Science and Technology of China (SUSTC) - Shenzhen Talent Peacock Plan; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1374877
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 2; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Wang, Huan, Chao, Pengjie, Chen, Hui, Mu, Zhao, Chen, Wei, and He, Feng. Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4- b ]thiophene Polymer Donor. United States: N. p., 2017. Web. doi:10.1021/acsenergylett.7b00551.
Wang, Huan, Chao, Pengjie, Chen, Hui, Mu, Zhao, Chen, Wei, & He, Feng. Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4- b ]thiophene Polymer Donor. United States. https://doi.org/10.1021/acsenergylett.7b00551
Wang, Huan, Chao, Pengjie, Chen, Hui, Mu, Zhao, Chen, Wei, and He, Feng. Wed . "Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4- b ]thiophene Polymer Donor". United States. https://doi.org/10.1021/acsenergylett.7b00551.
@article{osti_1374877,
title = {Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4- b ]thiophene Polymer Donor},
author = {Wang, Huan and Chao, Pengjie and Chen, Hui and Mu, Zhao and Chen, Wei and He, Feng},
abstractNote = {The chlorinated polymer, PBTCl, has been found to be an efficient donor in nonfullerene polymer solar cells (PSCs), which showed a blue-shifted absorbance compared to that of its fluorine analogue (PTB7-th) and resulted in more complementary light absorption with a nonfullerene acceptor, such as ITIC. Meanwhile, chlorine substitution lowered the HOMO level of PBTCl, which increased the open-circuit voltage of the corresponding polymer-based devices. The 2D GIWAXS analysis illustrated that the PBTCl/ITIC blend film exhibited a “face-on” orientation and scattering features of both PBTCl and ITIC, suggesting that the blend of PBTCl and ITIC was phase-separated and formed individual crystalline domains of the donor and acceptor, which promoted charge transfer in the bicontinuous film and eventually elevated the solar energy conversion efficiency. The PBTCl-based nonfullerene PSC exhibited a maximum PCE of 7.57% with a Voc of 0.91 V, which was an approximately 13% increasing in the PCE compared to that of the fluorine-analogue-based device.},
doi = {10.1021/acsenergylett.7b00551},
url = {https://www.osti.gov/biblio/1374877}, journal = {ACS Energy Letters},
issn = {2380-8195},
number = ,
volume = 2,
place = {United States},
year = {2017},
month = {8}
}

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    Works referencing / citing this record:

    Alkyl chain engineering of chlorinated acceptors for elevated solar conversion
    journal, January 2020


    Chlorinated Polymers for Efficient Solar Cells with High Open Circuit Voltage: The Influence of Different Thiazole Numbers
    journal, March 2019


    High-Performance Ambipolar Polymers Based on Electron-Withdrawing Group Substituted Bay-Annulated Indigo
    journal, January 2019


    Study of photovoltaic performances for asymmetrical and symmetrical chlorinated thiophene-bridge-based conjugated polymers
    journal, January 2020


    Over 14% Efficiency in Polymer Solar Cells Enabled by a Chlorinated Polymer Donor
    journal, March 2018


    High performance non-fullerene polymer solar cells based on PTB7-Th as the electron donor with 10.42% efficiency
    journal, January 2018


    Highly stable and bright fluorescent chlorinated polymer dots for cellular imaging
    journal, January 2019


    Nonfullerene small-molecule acceptors with perpendicular side-chains for fullerene-free solar cells
    journal, January 2018


    Ternary Blend Strategy for Achieving High-Efficiency Organic Solar Cells with Nonfullerene Acceptors Involved
    journal, May 2018