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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

Here, the chlorinated polymer, PBTCl, have been found to be an efficient donor in non-fullerene PSCs, which showed a blue-shifted absorbance compared to that of its fluorine analog (PTB7-th), and resulted in a more complementary light absorption with non-fullerene 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 bi-continuous film and eventually elevated the solar energy conversion efficiency. The PBTCl-based non-fullerene 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 the fluorine-analog-based device.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [2] ;  [1]
  1. Southern Univ. of Science and Technology, Shenzhen (People's Republic of China)
  2. Argonne National Lab. (ANL), Lemont, IL (United States); The Univ. of Chicago, Chicago, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 2; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Research Org:
Argonne National Laboratory (ANL), Argonne, IL (United States). Institute for Molecular Engineering and Materials Science Division
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1373484

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., 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. doi:10.1021/acsenergylett.7b00551.
Wang, Huan, Chao, Pengjie, Chen, Hui, Mu, Zhao, Chen, Wei, and He, Feng. 2017. "Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4-b]thiophene Polymer Donor". United States. doi:10.1021/acsenergylett.7b00551. https://www.osti.gov/servlets/purl/1373484.
@article{osti_1373484,
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 = {Here, the chlorinated polymer, PBTCl, have been found to be an efficient donor in non-fullerene PSCs, which showed a blue-shifted absorbance compared to that of its fluorine analog (PTB7-th), and resulted in a more complementary light absorption with non-fullerene 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 bi-continuous film and eventually elevated the solar energy conversion efficiency. The PBTCl-based non-fullerene 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 the fluorine-analog-based device.},
doi = {10.1021/acsenergylett.7b00551},
journal = {ACS Energy Letters},
number = ,
volume = 2,
place = {United States},
year = {2017},
month = {8}
}