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Side-chain effect on the photovoltaic performance of conjugated polymers based on benzodifuran and benzodithiophene-4,8-dione

Published online by Cambridge University Press:  29 April 2019

Enfang He ,
Hong Zhang ,
Yueyue Gao ,
Fengyun Guo ,
Shiyong Gao ,
Liancheng Zhao  and
Yong Zhang Open the ORCID record for Yong Zhang [Opens in a new window]
Enfang He
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin150001, China
Hong Zhang*
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin150001, China
Yueyue Gao
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin150001, China
Fengyun Guo
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin150001, China
Shiyong Gao
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin150001, China
Liancheng Zhao
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin150001, China
Yong Zhang*
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin150001, China
*
*(Email: [email protected])
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Abstract:

Two benzodifuran (BDF) polymers, PBDF-C and PBDF-S, with alkyl and alkylthio substituted thiophene side-chains and benzodithiophene-4,8-dione (BDD) as the acceptor were designed and synthesized. Their optical, electrochemical properties and photovoltaic performances were systematically investigated. The polymer solar cells (PSCs) with a device structure of ITO/PEDOT:PSS/polymer:PC71BM/Ca/Al were fabricated. The PBDF-C based device showed a power conversion efficiency (PCE) of 3.01% after adding 1 vol% 1,8-diodooctane (DIO) as the solvent additive, and PBDF-S gave an enhanced PCE of 3.48% without any post-treatments. The enhancements were from the higher open-circuit voltage (Voc) and fill factor (FF). The thermal- and solvent-treatment-free processing is more favourable for the large area roll-to-roll manufacturing or printing technology for PSCs.

Keywords

polymerorganicenergy generation
Type
Articles
Information
MRS Advances , Volume 4 , Issue 36: Energy and Sustainability , 2019 , pp. 2001 - 2007
Copyright
Copyright © Materials Research Society 2019 

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Footnotes

#

Both authors contribute equally.

References

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