(D)n-σ-(A)m type partially conjugated block copolymer and its performance in single-component polymer solar cells

Dae Hee Lee, Ji Hyung Lee, Hyung Jong Kim, Suna Choi, Gi Eun Park, Min Ju Cho, Dong Hoon Choi

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36 Citations (Scopus)


We synthesized two types of novel poly(3-alkylthiophene)-free (D)n-b-(A)m conjugated block copolymers: PTQI-block-PNDISs. PTQI-b-PNDIS is the fully conjugated block copolymer, in which the donor block is connected to the acceptor block via a π-conjugated unit. In addition, the donor block was connected to an acceptor block through a non-conjugated alkylene spacer, yielding PTQI-b-PNDISL, which is a partially conjugated block copolymer. The power conversion efficiency (PCE) was 1.54% with an open-circuit voltage of 0.79 V in the single-component polymer solar cell (PSC) based on PTQI-b-PNDISL, better performance than that of the PSC containing PTQI-b-PNDIS (PCE ∼ 0.36%). These results reveal the potential for improving the photovoltaic performance in PSCs by controlling the internal morphology with exploitation of the self-segregating behavior of p- and n-blocks in the film state.

Original languageEnglish
Pages (from-to)9745-9751
Number of pages7
JournalJournal of Materials Chemistry A
Issue number20
Publication statusPublished - 2017

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF2012R1A2A1A01008797) and by the Key Research Institute Program (NRF20100020209). GIWAXS measurements were performed using PLS-II 9A USAXS Beam line at the Pohang Accelerator Laboratory (Pohang, Korea). We thank KBSI for allowing the use of their HRTEM instrument.

Publisher Copyright:
© 2017 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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