Dielectric and electrical properties of an organic device containing benzotriazole and fluorene bearing copolymer

Authors

  • Dilber Esra Yildiz,

    Corresponding author
    1. Department of Physics, Faculty of Arts and Sciences, Hitit University, 19030 Çorum, Turkey
    • Department of Physics, Faculty of Arts and Sciences, Hitit University, 19030 Çorum, Turkey
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  • Dogukan Hazar Apaydın,

    1. Department of Polymer Science and Technology, Middle East Technical University, 06800 Ankara, Turkey
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  • Levent Toppare,

    1. Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
    2. Department of Biotechnology, Middle East Technical University, 06800 Ankara, Turkey
    3. The Center for Solar Energy Research and Applications (GUNAM), Middle East Technical University, 06800 Ankara, Turkey
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  • Ali Cirpan

    1. Department of Polymer Science and Technology, Middle East Technical University, 06800 Ankara, Turkey
    2. Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
    3. The Center for Solar Energy Research and Applications (GUNAM), Middle East Technical University, 06800 Ankara, Turkey
    4. Department of Micro and Nanotechnology, Middle East Technical University, 06800 Ankara, Turkey
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Abstract

Dielectric and electrical properties of a benzotriazole and fluorene copolymer were investigated using current-voltage (IV), capacitance-voltage (CV), and conductance–voltage (G/w–V) measurements at room temperature. The electrical parameters, barrier height (φBo), and ideality factor (n) obtained from the forward bias LnI-V plot were found as 0.453 eV and 2.08, respectively. The Rs values were found as 2.20,  2.12,  1.90 Ω using dV/dLnI versus I, H(I) versus I and F(V)-V plots, respectively. The dielectric constant (ε′), the dielectric loss (ε″), and the ac electrical conductivity ( σac) are a strong function of voltage and frequency. Decrease in ε′ and ε″ values with increasing frequency was observed. On the other hand, the increase of σac with increasing frequency was observed. Experimental results show that the conjugated copolymer plays an important role in the values of barrier height, ideality factor, series resistance, and dielectric parameters. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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