Photovoltaic Properties of Organic Thin-Film Solar Cell Using Various Exciton-Diffusion Blocking Materials

  • Mori Tatsuo
    Department of Electrical Engineering and Computer Science, Graduate School of Engineering, Nagoya University
  • Kato Kohei
    Department of Electrical Engineering and Computer Science, Graduate School of Engineering, Nagoya University

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We studied the photovoltaic properties of organic thin-film solar cell using 8-hydroxyquinoline aluminum (Alq3), 3,4,9,10-Perylenetetracarb-oxylicdianhydride (PTCDA) and Bathocuproine (BCP) as an exciton-diffusion blocking layer. Although the use of Alq3 caused comparative high open-circuit voltage, it led to much poor short-circuit current. The introduction of optimum thick BCP layer improved photovoltaic properties but the increase in BCP thickness incurred the reduction of those properties. organic thin-film solar cell with PTCDA showed stable photovoltaic properties in spite of the increase in PTCDA thickness. PTCDA was found to be one of excellent exciton-diffusion blocking materials.

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