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Synthesis and properties of a new conjugated polymer containing benzodithiophene for polymer solar cells

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Abstract

We have synthesized a new conjugated polymer PBDTDT containing 4,8-dioctyloxybenzo[1,2-b;3,4-b′]di-thiophene and 2,2′-dithiophene via a Stille coupling reaction. The copolymer was characterized by FTIR, NMR, GPC, TGA, DSC, UV–vis absorption, and electrochemical cyclic voltammetry. TGA showed that the copolymer exhibited good thermal stability. The optical, electrochemical, photovoltaic properties, and hole mobility of the copolymer were investigated and discussed. As a result, the polymer solar cell based on PBDTDT with a conventional device configuration of ITO/PEDOT:PSS/PBDTDT:PC61BM/LiF/Al showed a power conversion efficiency of 1.19 %, with a short-circuit current density (J sc) of 4.72 mA/cm2, an open-circuit voltage (V oc) of 0.6 V and a fill factor of 53.3 % under the AM 1.5G illumination with an intensity of 100 mW/cm2 from a solar simulator.

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Acknowledgments

The financial support provided by the National Science Council (Taiwan, ROC) through project NSC 99-2627-E-006-001 is greatly appreciated.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Research Center for Energy Technology and Strategy, Center for Micro/Nano Science and Technology, National Cheng-Kung University, Tainan, 701-01, Taiwan, ROC

    Hung-Yi Chuang, Steve Lien-Chung Hsu, Po-I Lee, Jung-Feng Lee, Shih-Yin Huang & Shih-Wei Lin

  2. The Instrument Center of National Cheng Kung University, Tainan, 701-01, Taiwan, ROC

    Pi-Yun Lin

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  1. Hung-Yi Chuang
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  2. Steve Lien-Chung Hsu
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Correspondence to Steve Lien-Chung Hsu.

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Chuang, HY., Hsu, S.LC., Lee, PI. et al. Synthesis and properties of a new conjugated polymer containing benzodithiophene for polymer solar cells. Polym. Bull. 71, 1117–1130 (2014). https://doi.org/10.1007/s00289-014-1114-5

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  • DOI: https://doi.org/10.1007/s00289-014-1114-5

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