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      https://www.ias.ac.in/article/fulltext/boms/018/03/0277-0281

    • Keywords

       

      Organic semiconductors; films; polymer

    • Abstract

       

      The photocurrent and electrolyte electromodulation (EEM) spectra of thin films of metal-free phthalocyanine (H2Pc) and of copper phthalocyanine (CuPc) were investigated. The modulation spectra yielded three distinct features around 1·61, 2·30 and 2·93 eV for H2Pc and around 1·63, 2·04 and 3·20 eV for CuPc. The spectral dependence maxima of photoconductivity correspond to the modulation spectra. These features are interpreted to indicate transitions at critical points, i.e. the existence of transitions between three valence bands, since Pc’s are p-type, and the lowest conduction band in Pc’s.

    • Author Affiliations

       

      Francis P Xavier1 2 George J Goldsmith1

      1. Physics Department, Boston College, Chestnut Hill, MA - 02167, USA
      2. Physics Department, Loyola College, Madras - 600 034, India
    • Dates

       
  • Bulletin of Materials Science | News

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