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Synthesis and characterization of spirobifluorene-based polymers for organic light-emitting diode applications

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Abstract

The following series of blue EL polymers was synthesized using the Suzuki polymerization method: poly(3′,6′-bis(3,7-dimethyloctyloxy)-9,9′-spirobifluorene-2,7-diyl) poly[(OC10)2-spirobifluorene], poly(3′,6′-bis(3,7-dimethyloctyloxy)-9,9′-2,7-diyl-co-4-(3,7-dimethyloctyloxy) phenyl-diphenylamine-4′,4′-diyl} poly[(OC10)2-spirobifluorene-TPA] (5∶1, 9∶1) and poly(3′,6′-bis(3,7-dimethyloctyloxy)-9′,9′-spirobifluorene-2,7-diyl-co-4-(6-((3-methyloxetan-3-yl)methoxy) hexyloxyphenyl-bisphenylamine-4′,4′-diyl) poly[(OC10)2-spirobifluorene-TPA-oxetane]. The weight average molecular weight (Mw) and polydispersity of the resulting polymers ranged from 1.6×104–1.5×105 and 1.77–2.31, respectively. The resulting polymers were completely soluble in common organic solvents and were easily spin-coated onto an indium tin oxide (ITO) substrate. The polymers exhibited strong blue emission peaking at 450 nm. The maximum brightness and luminance efficiency were 9,960 cd/m2 and 1.2 cd/A, respectively.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Pusan National University, 609-735, Busan, Korea

    Md. Anwarul Karim & Young-Rae Cho

  2. Department of Chemistry Education and Interdisciplinary Program of Advanced Information and Display Materials, Pusan National University, 609-735, Busan, Korea

    Jin Su Park, Kyung-Jin Yoon, Seung Joon Lee & Sung-Ho Jin

  3. Department of Electronics Engineering, Dong-A University, 604-714, Busan, Korea

    Gi-Dong Lee

  4. Polymer Chemistry Lab., Kyungil University, 712-701, Hayang, Korea

    Yeong-Soon Gal

Authors
  1. Md. Anwarul Karim
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  2. Young-Rae Cho
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  3. Jin Su Park
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  4. Kyung-Jin Yoon
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  5. Seung Joon Lee
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  6. Sung-Ho Jin
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  7. Gi-Dong Lee
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  8. Yeong-Soon Gal
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Correspondence to Sung-Ho Jin or Gi-Dong Lee.

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Karim, M.A., Cho, YR., Park, J.S. et al. Synthesis and characterization of spirobifluorene-based polymers for organic light-emitting diode applications. Macromol. Res. 16, 337–344 (2008). https://doi.org/10.1007/BF03218526

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  • DOI: https://doi.org/10.1007/BF03218526

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