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Dielectric and ac conduction properties of zinc phthalocyanine (ZnPc) thin films

Senthilarasu, S.; Sathyamoorthy, R.; Ascencio, J.A.; Lee, Soo-Hyoung; Hahn, Y.B.


R. Sathyamoorthy

J.A. Ascencio

Soo-Hyoung Lee

Y.B. Hahn


The dielectric responses of zinc phthalocyanine (ZnPc) thin films, deposited using the vacuum evaporation technique, were studied as functions of frequency and temperature. The conductivity of the deposited films decreases with increase in temperature. The dielectric studies clearly indicated that the Debye type of polarization exists in these films. The relaxation phenomena have been confirmed from the Cole-Cole plot. The relaxation times have been evaluated from the plot and were found to be (τa) 0.0137 and 0.0106 s at 303 and 403 K , respectively. The prevailing conduction mechanism in ZnPc films, under an ac field, was found to be electronic hopping. The activation energy was evaluated from the Arrhenius plot and was found to be 1.28 eV . Based on the structure, and with the help of quantum mechanics calculations, the electronic structure and behavior that upheld our experimental results were identified.

Journal Article Type Article
Acceptance Date Dec 11, 2006
Online Publication Date Feb 12, 2007
Publication Date 2007-02
Deposit Date Mar 14, 2023
Print ISSN 0021-8979
Electronic ISSN 1089-7550
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 101
Issue 3
Article Number 034111