Molecular-weight engineering of high-performing diketopyrrolopyrrole-based copolymer bearing high π-extended long donating units

Mai Ha Hoang; Duc Nghia Nguyen; Trinh Tung Ngo; Hyun Ah Um; Min Ju Cho; Dong Hoon Choi

doi:10.1016/j.polymer.2015.12.016

Molecular-weight engineering of high-performing diketopyrrolopyrrole-based copolymer bearing high π-extended long donating units

Mai Ha Hoang, Duc Nghia Nguyen, Trinh Tung Ngo, Hyun Ah Um, Min Ju Cho, Dong Hoon Choi

Department of Chemistry

Research output: Contribution to journal › Article

6 Citations (Scopus)

Abstract

Two D-A alternating π-conjugated copolymers bearing diketopyrrolopyrrole (DPP) and sextetthiophene with different molecular weights were synthesized to investigate their physical properties and performance in thin-film transistors and photovoltaic cells. The solubility and molecular weight (MW) of these copolymers with a highly rigid backbone were improved by controlling the feeding ratio of the monomer in the polymerization mixture. These polymers exhibited high crystallinity with a predominant edge-on chain orientation on the substrate. The higher-MW P(DPP-6T)-2 copolymer displayed a higher hole mobility of 3.26 cm² V^-1 s^-1 than the low-MW P(DPP-6T)-1 copolymer. Bulk heterojunction photovoltaic cells made of a blend of P(DPP-6T)-2 and (6,6)-phenyl C₇₁-butyric acid methyl ester displayed good device performance with a power conversion efficiency of 4.68%.

Original language	English
Pages (from-to)	77-84
Number of pages	8
Journal	Polymer (United Kingdom)
Volume	83
DOIs	https://doi.org/10.1016/j.polymer.2015.12.016
Publication status	Published - 2016 Jan 28

Keywords

Diketopyrrolopyrrole
Photovoltaic cell
Thin film transistor

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

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10.1016/j.polymer.2015.12.016

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Hoang, M. H., Nguyen, D. N., Ngo, T. T., Um, H. A., Cho, M. J., & Choi, D. H. (2016). Molecular-weight engineering of high-performing diketopyrrolopyrrole-based copolymer bearing high π-extended long donating units. Polymer (United Kingdom), 83, 77-84. https://doi.org/10.1016/j.polymer.2015.12.016

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abstract = "Two D-A alternating π-conjugated copolymers bearing diketopyrrolopyrrole (DPP) and sextetthiophene with different molecular weights were synthesized to investigate their physical properties and performance in thin-film transistors and photovoltaic cells. The solubility and molecular weight (MW) of these copolymers with a highly rigid backbone were improved by controlling the feeding ratio of the monomer in the polymerization mixture. These polymers exhibited high crystallinity with a predominant edge-on chain orientation on the substrate. The higher-MW P(DPP-6T)-2 copolymer displayed a higher hole mobility of 3.26 cm2 V-1 s-1 than the low-MW P(DPP-6T)-1 copolymer. Bulk heterojunction photovoltaic cells made of a blend of P(DPP-6T)-2 and (6,6)-phenyl C71-butyric acid methyl ester displayed good device performance with a power conversion efficiency of 4.68%.",

keywords = "Diketopyrrolopyrrole, Photovoltaic cell, Thin film transistor",

author = "Hoang, {Mai Ha} and Nguyen, {Duc Nghia} and Ngo, {Trinh Tung} and Um, {Hyun Ah} and Cho, {Min Ju} and Choi, {Dong Hoon}",

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AU - Hoang, Mai Ha

AU - Nguyen, Duc Nghia

AU - Ngo, Trinh Tung

AU - Um, Hyun Ah

AU - Cho, Min Ju

AU - Choi, Dong Hoon

PY - 2016/1/28

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AB - Two D-A alternating π-conjugated copolymers bearing diketopyrrolopyrrole (DPP) and sextetthiophene with different molecular weights were synthesized to investigate their physical properties and performance in thin-film transistors and photovoltaic cells. The solubility and molecular weight (MW) of these copolymers with a highly rigid backbone were improved by controlling the feeding ratio of the monomer in the polymerization mixture. These polymers exhibited high crystallinity with a predominant edge-on chain orientation on the substrate. The higher-MW P(DPP-6T)-2 copolymer displayed a higher hole mobility of 3.26 cm2 V-1 s-1 than the low-MW P(DPP-6T)-1 copolymer. Bulk heterojunction photovoltaic cells made of a blend of P(DPP-6T)-2 and (6,6)-phenyl C71-butyric acid methyl ester displayed good device performance with a power conversion efficiency of 4.68%.

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