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Doping a D-A structural polymer based on benzodithiophene and triazoloquinoxaline for efficiency improvement of ternary solar cells

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Abstract

A novel donor-acceptor (D-A) structural polymer PBDT-BTzQx-C12 consisting of benzodithiophene and triazoloquinoxaline units as donor and acceptor building blocks was synthesized. The PBDT-BTzQx-C12 was evaluated as complementary electron donor in polymer solar cells (PSCs) with poly(3-hexylthiophene) (P3HT) as electron donor and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as electron acceptor. The power conversion efficiencies (PCEs) of PSCs were improved from 3.18% to 3.54% by doping 2 wt. % PBDT-BTzQx-C12, corresponding to an approximately 11% PCE improvement. The performance improvement of ternary PSCs should be attributed to the increase of photon harvesting and the optimized phase separation of active layers by doping D-A structural PBDT-BTzQx-C12.

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Authors and Affiliations

  1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing, 100044, China

    Qianqian Sun, Fujun Zhang & Feng Teng

  2. Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, China

    Jiefeng Hai, Jiangsheng Yu & Weihua Tang

  3. School of Electrical Engineering, Beijing Jiaotong University, Beijing, 100044, China

    Hui Huang

Authors
  1. Qianqian Sun
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  2. Fujun Zhang
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  3. Jiefeng Hai
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  4. Jiangsheng Yu
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  5. Hui Huang
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  6. Feng Teng
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  7. Weihua Tang
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Correspondence to Fujun Zhang, Feng Teng or Weihua Tang.

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Sun, Q., Zhang, F., Hai, J. et al. Doping a D-A structural polymer based on benzodithiophene and triazoloquinoxaline for efficiency improvement of ternary solar cells. Electron. Mater. Lett. 11, 236–240 (2015). https://doi.org/10.1007/s13391-014-4326-9

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  • DOI: https://doi.org/10.1007/s13391-014-4326-9

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