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Issue 26, 2017
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Relating polymer chemical structure to the stability of polymer:fullerene solar cells

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Abstract

The design of novel polymers has brought more attention to bulk heterojunction polymer:fullerene solar cells in the past decade. A typical example is the synthesis, through chemical structure engineering, of the benzodithiophene-co-thieno[3,4-b]thiophene (BDT-TT) polymers leading to power conversion efficiency of over 10%. In this work, we study the stability for a set of PBDT-TT polymers. We conduct a systematic UV-degradation study on the solar cells. Most importantly, the paper shows clearly the effect of polymer chemical structure on the UV-degradation pathway of the solar cells. We find that based on the polymer chemical structure, solar cells of polymers with alkoxy side chains are more stable (<20% loss in PCE) than those with alkylthienyl side chains (∼48% loss in PCE) over the period of study. These findings pave the way for new materials that yield efficient as well as stable organic solar cells.

Graphical abstract: Relating polymer chemical structure to the stability of polymer:fullerene solar cells

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Publication details

The article was received on 05 Apr 2017, accepted on 08 Jun 2017 and first published on 21 Jun 2017


Article type: Paper
DOI: 10.1039/C7TC01455D
Citation: J. Mater. Chem. C, 2017,5, 6611-6619
  • Open access: Creative Commons BY-NC license
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    Relating polymer chemical structure to the stability of polymer:fullerene solar cells

    N. Y. Doumon, G. Wang, R. C. Chiechi and L. J. A. Koster, J. Mater. Chem. C, 2017, 5, 6611
    DOI: 10.1039/C7TC01455D

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