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A New Copolymer Based on D-π-A or D-A-π Repeat Unit for Polymer Solar Cells Employing Non-halogenated Solvents

Abstract

It’s a challenge to prepare high-performance polymer solar cells (PSCs) employing non-halogenated solvents due to the poor solubility of conjugated polymer. Here, a new region-random copolymer, in contrast to traditional polymers featuring D-A or D-π-A-π backbone, is synthesized and fully characterized. By polymerizing ffBT-T (π-A) units with BDT (D) units, the resulted polymer PBDT-ffBT-T (P1T) with repeat units of D-π-A or D-A-π exhibits superior solubility in non-halogenated solvent and outperforms its traditional analogues with the highest performance of 8.53% when processed from anisole. Importantly, the optimal device performance is attained at the thickness of active layer over 200 nm and shows no batch-to-batch difference, implying its compatibility with printing technology. Our results demonstrate this simple chemical modification for copolymers may significantly benefit the development of PSCs using environmentally friendly solvents.

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Publication details

The article was received on 29 Mar 2018, accepted on 16 Apr 2018 and first published on 16 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA02915F
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    A New Copolymer Based on D-π-A or D-A-π Repeat Unit for Polymer Solar Cells Employing Non-halogenated Solvents

    Y. Xin, G. Zeng, J. Zhang, X. Zhao and X. Yang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02915F

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