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New donor-acceptor copolymer containing dialkoxy naphthalene and carbonylated thieno[3,4-b]thiophene for OTFT and OPV

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Abstract

A new copolymer (PONTET), composed of dialkoxy napthalene as donor and a carbonylated thieno [3,4-b]thiophene group as an acceptor, was obtained by Suzuki coupling polymerization. The number average molecular weight (M n ) of PONTET is 6.4 kg mol−1 with a polydispersity index of 1.20, determined by gel permeation chromatography using chloroform. PONTET showed broad absorption with a maximum at 534 nm in solution and 618 nm in a thin film, respectively. The hole mobility of PONTET was 1.5×10−3 cm2/Vs and the I on /I off ratio was 7.7×104. The maximum power conversion efficiency of a PONTET:PC70BM (1:4)-based solar cell reached 1.3% with an open circuit voltage (V oc ) of 0.56 V, a short circuit current density (J sc ) of 5.6 mA/cm2, and a fill factor (FF) of 41.3%.

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Authors and Affiliations

  1. School of Materials Science and Engineering and ERI, Gyeongsang National University, Gyeongnam, 660-701, Korea

    Gi Back Lee & Jin Hak Kim

  2. Department of Chemistry, Gyeongsang National University, Gyeongnam, 660-701, Korea

    Ran Kim & Yun-Hi Kim

  3. Organic Electronics Laboratory, Department of Chemical Engineering, Pohang University of Science and Technology, Gyeongnam, 790-784, Korea

    Hyo-Jung Cha & Chan Eon Park

Authors
  1. Gi Back Lee
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  2. Ran Kim
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  3. Hyo-Jung Cha
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  4. Chan Eon Park
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  5. Jin Hak Kim
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  6. Yun-Hi Kim
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Corresponding authors

Correspondence to Chan Eon Park, Jin Hak Kim or Yun-Hi Kim.

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Lee, G.B., Kim, R., Cha, HJ. et al. New donor-acceptor copolymer containing dialkoxy naphthalene and carbonylated thieno[3,4-b]thiophene for OTFT and OPV. Macromol. Res. 22, 569–573 (2014). https://doi.org/10.1007/s13233-014-2068-z

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  • DOI: https://doi.org/10.1007/s13233-014-2068-z

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