Synthesis of Conjugated Wide-Bandgap Copolymers Bearing Ladder-Type Donating Units and Their Application to Non-Fullerene Polymer Solar Cells

Mai Ha Hoang, Gi Eun Park, Dinh Long Phan, Trinh Tung Ngo, Tuyen Van Nguyen, Chang Geun Park, Min Ju Cho, Dong Hoon Choi

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    Two new wide-bandgap conjugated copolymers, T-3MT and 2T-3MT, containing methyl-3-thiophenecarboxylate (3MT) as a weak accepting unit and indacenodithiophene (IDT) or indacenodithienothiophene (IDTT) as ladder-type donating units, were synthesized through Stille coupling polymerization. The effects of the IDT and IDTT units on the physical, optical, and electrochemical properties of these copolymers were investigated. Polymer solar cells (PSCs) were constructed using these new copolymers and different acceptor molecules for inter-comparative analysis of their performance. The PSCs bearing the as-cast active layers with 2,2′-((2Z,2′Z)-((4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b′] dithiophene-2,7-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IM-IDT) displayed the highest PCEs of 3.78−3.96%, mainly owing to the predominant face-on orientation of blend film, and the relatively high open circuit voltage exceeding 1.0 V. [Figure not available: see fulltext.].

    Original languageEnglish
    Pages (from-to)844-850
    Number of pages7
    JournalMacromolecular Research
    Volume26
    Issue number9
    DOIs
    Publication statusPublished - 2018 Sept 1

    Bibliographical note

    Funding Information:
    Acknowledgments: This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 104.02-2015.89. This research was also supported by the National Research Foundation of Korea (NRF20100020209). We are grateful to Pohang Accelerator Laboratory (Pohang, Korea) for allowing us to conduct the grazing incidence wide angle X-ray scattering (GIWAXS) measurements. The image from this article is used as the cover image of the Volume 26, Issue 9.

    Publisher Copyright:
    © 2018, The Polymer Society of Korea and Springer Science+Business Media B.V., part of Springer Nature.

    Keywords

    • as-cast film
    • conjugated copolymer
    • ladder type monomer
    • polymer solar cell
    • simple process
    • wide bandgap

    ASJC Scopus subject areas

    • General Chemical Engineering
    • Organic Chemistry
    • Polymers and Plastics
    • Materials Chemistry

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