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Conjugated polymers with benzothiadiazole and benzotriazole moieties for polymer solar cells

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  • Keles, Duygu
  • Erer, Mert Can
  • Bolayir, Eda
  • Cevher, Sevki Can
  • Hizalan, Gonul
  • Toppare, Levent
  • Cirpan, Ali

Abstract

In this study four novel random polymers, comprising benzothiadiazole and benzotriazole as the accepting units and benzodithiophene as the donor unit, were synthesized via Stille polymerization reaction. Moreover, effects of fluorine atom and π bridges on optical, electrochemical and optoelectronic properties were investigated. Optical band gap values of P1, P2, P3 and P4 were found as 1.78 eV, 1.72 eV, 1.63 eV and 1.73 eV, respectively. Characterization of polymers via UV–Vis–NIR spectroscopy, cyclic voltammetry (CV), gel permeation chromatography (GPC) and thermal analysis were carried out. Polymer solar cells (PSCs) were constructed and characterized in N2 filled glove box. While the polymers act as electron donors, PC71BM was the electron acceptor in the PSCs with the device structure of ITO/PEDOT:PSS/Polymer:PC71BM/LiF/Al. As a consequence of measurements under standard AM 1.5 G illumination (100 mW/cm2), the highest power conversion efficiency values were recorded as 4.10% 3.84%, 1.60% and 3.83% for P1, P2, P3 and P4 based PSCs, respectively.

Suggested Citation

  • Keles, Duygu & Erer, Mert Can & Bolayir, Eda & Cevher, Sevki Can & Hizalan, Gonul & Toppare, Levent & Cirpan, Ali, 2019. "Conjugated polymers with benzothiadiazole and benzotriazole moieties for polymer solar cells," Renewable Energy, Elsevier, vol. 139(C), pages 1184-1193.
    • Handle: RePEc:eee:renene:v:139:y:2019:i:c:p:1184-1193
    DOI: 10.1016/j.renene.2019.03.018
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    References listed on IDEAS

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    1. Gupta, Deepak K. & Langelaar, Matthijs & Barink, Marco & van Keulen, Fred, 2016. "Optimizing front metallization patterns: Efficiency with aesthetics in free-form solar cells," Renewable Energy, Elsevier, vol. 86(C), pages 1332-1339.
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    Cited by:

    1. Yasa, Mustafa & Depci, Tolga & Alemdar, Eda & Hacioglu, Serife O. & Cirpan, Ali & Toppare, Levent, 2021. "Non-fullerene organic photovoltaics based on thienopyrroledione comprising random copolymers; effect of alkyl chains," Renewable Energy, Elsevier, vol. 178(C), pages 202-211.

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