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Fluorinated pyrazine-based D–A conjugated polymers for efficient non-fullerene polymer solar cells

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Abstract

Over the past decade, fluorinated materials have become the dominant donors for achieving high power conversion efficiencies in organic solar cells (OSCs). Research on F substituents on N-heterocycle-based polymer solar cells was firstly carried out by introduction of the F atom into the pyrazine-based acceptor unit, which was successfully applied in constructing a polymer (BDT-FPY) for PSCs. MeIC-based polymer solar cells (PSCs) with BDT-FPY as a donor achieve a high power conversion efficiency (PCE) of up to 12.30%, significantly higher than that of a device based on BDT-PY:MeIC (the PCE of unfluorinated polymer donor BDT-PY is 10.2%). The higher PCE of BDT-FPY:MeIC is attributed to more balanced μh/μe, better molecular packing, and more appropriate phase separation features. This result shows great potential for creating high-performance N-heterocycle-based PSCs.

Graphical abstract: Fluorinated pyrazine-based D–A conjugated polymers for efficient non-fullerene polymer solar cells

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Supplementary files

Article information


Submitted
15 Jan 2020
Accepted
11 Mar 2020
First published
11 Mar 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Communication

Fluorinated pyrazine-based D–A conjugated polymers for efficient non-fullerene polymer solar cells

K. Chen, R. Ma, T. Liu, Z. Luo, X. Xu, Q. Wang, Y. Chen, Y. Xiao, X. Lu and H. Yan, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA00599A

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