Investigation of Quinquethiophene Derivatives with Different End Groups for High Open Circuit Voltage Solar Cells

Authors

  • Guankui Long,

    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
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  • Xiangjian Wan,

    Corresponding author
    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
    • Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn.
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  • Bin Kan,

    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
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  • Yongsheng Liu,

    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
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  • Guangrui He,

    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
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  • Zhi Li,

    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
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  • Yawei Zhang,

    1. College of Chemistry, Nankai University, 300071, Tianjin, China
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  • Yi Zhang,

    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
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  • Qian Zhang,

    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
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  • Mingtao Zhang,

    1. College of Chemistry, Nankai University, 300071, Tianjin, China
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  • Yongsheng Chen

    Corresponding author
    1. Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn
    • Key Laboratory of Functional Polymer Materials and Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China, E-mail: yschen99@nankai.edu.cn.
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Abstract

Three quinquethiophene derivatives with different end groups of octyl 2-cyanoacetate (DCAO5T), 3-ethylrhodanine (DERHD5T) and 2H-indene-1,3-dione (DIN5T) are synthesized in order to obtain higher open circuit voltage (Voc) than their septithiophene analogs. The photovoltaic performance of these three molecules as donors and fullerene derivatives as the acceptors in bulk heterojunction solar cells are studied by using the simple solution spin-coating fabrication process. Among them, DERHD5T shows Voc as high as 1.08 volt and power conversion efficiency of 4.63% under AM 1.5G irradiation (100 mW cm−2). The reasons for the high Voc were investigated by the theoretical simulations and consistent results have been obtained in comparison with experimental measurements.

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