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Poly(4,8-bis(2-ethylhexyloxy)benzo[1,2-b:4,5-b′]dithiophene vinylene): Synthesis, optical and photovoltaic properties

Authors

  • Youjun He,

    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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  • Yi Zhou,

    Corresponding author
    1. Biomolecular and Organic Electronics, IFM, Linköping University, Linköping SE-581 83, Sweden
    • Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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  • Guangjin Zhao,

    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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  • Jie Min,

    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Xia Guo,

    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Bo Zhang,

    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Maojie Zhang,

    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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  • Jing Zhang,

    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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  • Yongfang Li,

    Corresponding author
    1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    • Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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  • Fengling Zhang,

    1. Biomolecular and Organic Electronics, IFM, Linköping University, Linköping SE-581 83, Sweden
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  • Olle Inganäs

    1. Biomolecular and Organic Electronics, IFM, Linköping University, Linköping SE-581 83, Sweden
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Abstract

A new benzodithiophene (BDT)-based polymer, poly(4,8-bis(2-ethylhexyloxy)benzo[1,2-b:4,5-b′]dithiophene vinylene) (PBDTV), was synthesized by Pd-catalyzed Stille-coupling method. The polymer is soluble in common organic solvents and possesses high thermal stability. PBDTV film shows a broad absorption band covering from 350 nm to 618 nm, strong photoluminescence peaked at 545 nm and high hole mobility of 4.84 × 10−3 cm2/Vs. Photovoltaic properties of PBDTV were studied by fabricating the polymer solar cells based on PBDTV as donor and PC70BM as acceptor. With the weight ratio of PBDTV: PC70BM of 1:4 and the active layer thickness of 65 nm, the power conversion efficiency of the device reached 2.63% with Voc = 0.71 V, Isc = 6.46 mA/cm2, and FF = 0.57 under the illumination of AM1.5, 100 mW/cm2. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1822–1829, 2010

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