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Advanced Materials

Novel Benzo[1,2-b:4,5-b′]dithiophene–Benzothiadiazole Derivatives with Variable Side Chains for High-Performance Solar Cells

Authors

  • Qiang Peng,

    Corresponding author
    1. School of Environmental and Chemical Engineering, Nanchang Hangkong University, 696 Fe He Nan Da Dao Road, Nanchang, 330063, P. R. China
    • School of Environmental and Chemical Engineering, Nanchang Hangkong University, 696 Fe He Nan Da Dao Road, Nanchang, 330063, P. R. China
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  • Xiangju Liu,

    1. School of Environmental and Chemical Engineering, Nanchang Hangkong University, 696 Fe He Nan Da Dao Road, Nanchang, 330063, P. R. China
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  • Dan Su,

    1. School of Environmental and Chemical Engineering, Nanchang Hangkong University, 696 Fe He Nan Da Dao Road, Nanchang, 330063, P. R. China
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  • Guanwen Fu,

    1. School of Environmental and Chemical Engineering, Nanchang Hangkong University, 696 Fe He Nan Da Dao Road, Nanchang, 330063, P. R. China
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  • Jun Xu,

    1. School of Environmental and Chemical Engineering, Nanchang Hangkong University, 696 Fe He Nan Da Dao Road, Nanchang, 330063, P. R. China
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  • Liming Dai

    Corresponding author
    1. Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA
    • Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
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Abstract

Low bandgap copolymers are prepared by incorporating thiophene-modified benzo[1,2-b:4,5-b′]dithiophene and alkyloxy or fluorine-modified benzothiadiazole as donor and acceptor units. These copolymers exhibit a high open-circuit voltage and short-circuit current density. Good power conversion efficiencies are demonstrated in solar cell studies, indicating their promising photovoltaic application as donor materials.

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