Electrical properties of hybrid phthalocyanines thin films using gold and lead electrodes

A. C. Varghese () and C. S. Menon

The European Physical Journal B: Condensed Matter and Complex Systems, 2005, vol. 47, issue 4, 485-489

Abstract: The electrical properties of mixed copper phthalocyanine (CuPc) and nickel phthalocyanine (NiPc) thin films devices with gold and lead electrodes have been investigated. The two phthalocyanines were co-evaporated and deposited on to a pre-cleaned glass substrate by thermal evaporation technique at room temperature. By the co-sublimation technique an integrated phthalocyanine sample was prepared. At low voltages the film showed an ohmic conduction whereas at higher voltage levels the conduction mechanisms were dominated by space charged limited conduction (SCLC). The value of mobility of holes were calculated as μ= 3.1×10 -8 m 2 V -1 s -1 which is lower for the mixed phthalocyanines whereas the trap concentrations N t(e) =8.06 ×10 25 m -3 have increased in the SCLC region. Further the reverse conduction mechanisms have also been investigated. From the current limitations in the reverse condition a strong rectifying behaviour was evident. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Date: 2005
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DOI: 10.1140/epjb/e2005-00352-7

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