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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/017/01/0051-0057

    • Keywords

       

      Dark and photoconduction; polyenes; organic semiconductor; organic photoconductor; trap; decay kinetics

    • Abstract

       

      Dark and photoconductive properties ofα-ω-di-2-naphthyl polyenes were studied at different applied voltages and temperatures. These studies indicate that a single dominant trapping level is involved in both conduction processes. From this study some transport parameters are evaluated. Dependence of photocurrent on excitation light intensity indicates that the carrier generation process is a one-photon process and is trap-limited. The photocurrent decay study indicates that most of the photocarriers decay exponentially with time. Trap depths are calculated from the temperature dependence of decay constant and is found to be the same as that obtained from thermally stimulated current. The dependence of photocurrent on wavelength indicates two mechanisms of photocarrier generation process: one is excitonic and the other is intrinsic electron-hole pair production.

    • Author Affiliations

       

      Seema Sen1 Prabir Pal1 T N Misra1

      1. Spectroscopy Department, Indian Association for the Cultivation of Science, Calcutta - 700 032, India
    • Dates

       
  • Bulletin of Materials Science | News

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