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      From benzobisthiadiazole, thiadiazoloquinoxaline to pyrazinoquinoxaline based polymers : effects of aromatic substituents on the performance of organic photovoltaics

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      Author
      Tam, Dexter Teck Lip
      Salim, Teddy
      Li, Hairong
      Zhou, Feng
      Mhaisalkar, Subodh Gautam
      Su, Haibin
      Lam, Yeng Ming
      Grimsdale, Andrew C.
      Date of Issue
      2012
      School
      School of Materials Science and Engineering
      Research Centre
      Energy Research Institute
      Abstract
      Here we report the syntheses of low bandgap polymers based on benzobisthiadiazole (BBT), thiadiazoloquinoxaline (TQ) and pyrazinoquinoxaline (PQ) core structures with different aromatic substituents. The effects of changing core structures from BBT to PQ and also substituents from biphenyl and bithienyl on the photophysical, electrochemical and morphology of the polymers were studied. These polymers were incorporated into solar cell devices as donors, with PC[71]BM as acceptors, and their device performances were correlated with their properties. It was found that the effect of these structural changes has significant consequences on the overall device performances.
      Type
      Journal Article
      Series/Journal Title
      Journal of materials chemistry
      Rights
      © 2012 The Royal Society of Chemistry.
      Collections
      • MSE Journal Articles
      • ERI@N Journal Articles
      http://dx.doi.org/10.1039/c2jm33317a
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