Barrier Properties of Printed Composite Zinc Phthalocyanine/Fullerene Sandwiched between Indium Tin Oxide and Alluminium Electrodes

Oldrich Zmeskal; Jan Pospisil; Jakub Altsmid; Stanislav Nespurek

doi:10.4028/www.scientific.net/AMM.377.156

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Barrier Properties of Printed Composite Zinc Phthalocyanine/Fullerene Sandwiched between Indium Tin Oxide and Alluminium Electrodes
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 377Barrier Properties of Printed Composite Zinc...

Barrier Properties of Printed Composite Zinc Phthalocyanine/Fullerene Sandwiched between Indium Tin Oxide and Alluminium Electrodes

Abstract:

TO/ZnPcSu-PCBM/Al heterostructure was prepared by ink-printing and studied by DC (current-voltage characteristics) and AC (dielectric spectroscopy) techniques (ZnPcSu means 3-diethylamino-1-propylsulphonamide substituted Zn phthalocyanine, PCBM phenyl-C61-butyric acid-methylester fullerene). At the Al contact a Schottky barrier was formed. To explain the shape of current-voltage characteristic two effects had to be taken into account, emission effect, overcoming the potential barrier effect, formed by the superposition of the image Coulombic, space-charge and external potentials, by charge carrier. Dielectric spectroscopy made possible to determine effective lifetime of charge carriers and characteristic time related to electron diffusion; lifetime of charge carriers was τ_d = 2.10^-5 s, and the electron mobility was of order 10⁴ cm²V^-1s^-1.

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Periodical:

Applied Mechanics and Materials (Volume 377)

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156-160

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.377.156

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Online since:

August 2013

Authors:

Oldrich Zmeskal, Jan Pospisil, Jakub Altsmid, Stanislav Nespurek

Keywords:

Current-Voltage Characteristic, Fullerene, Impedance Spectroscopy, Schottky Barrier, Zinc Phthalocyanine

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