Determination Of Trap Parameters From Photocurrent Decay Measurements: Metal-Free Phthalocyanine Films

  • I. Zhivkov
  • S. Nešpůrek
  • J. Sworakowski
Part of the NATO Science Series book series (NAII, volume 80)


The energy distribution of traps in gap samples of thin vacuum-evaporated metal- free phthalocyanine (H2Pc) films was determined from measurements of photocurrent decays performed at several temperatures, in a nitrogen atmosphere. The parameters of the traps were determined using a straightforward method of the analysis of a first-order process, with distributed parameters. It was found that the photocurrents are controlled by a narrow distribution of shallow traps peaking at about 0.2 eV, with a distribution width of about 0.015 eV and a very low effective attempt-to-escape factor.


Shallow Trap Trap Parameter Relaxation Current Photocurrent Decay Photocurrent Relaxation 
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Copyright information

© Springer Science+Business Media Dordrecht 2002

Authors and Affiliations

  • I. Zhivkov
    • 1
    • 2
  • S. Nešpůrek
    • 2
  • J. Sworakowski
    • 3
  1. 1.Central Laboratory of PhotoprocessesBulgarian Academy of SciencesSofiaBulgaria
  2. 2.Institute ofMacromolecular ChemistryAcademy of Sciences of the Czech RepublicPrague 6Czech Republic
  3. 3.Institute of Physical and Theoretical ChemistryTechnical University of WroclawWroclawPoland

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