Transport Properties in 2,6-Diamino Anthraquinone
S.M. Khalil
Physics Department, Alexandria University, Alexandria, Egypt

and S. Darwish
Physics Department, El-Minia University, El-Minia, Egypt
Received: August 3, 1993; revised version: December 14, 1993
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Current density-voltage characteristics were obtained from 2,6-diamino anthraquinone samples using ohmic aluminium electrodes. Results showed that at low voltage the conduction process was ohmic, while at high voltage space-charge-limited conduction controlled by a single dominant trap level was presented. Thickness dependence measurements proved that the trapping sites were located at a discrete energy level. The transition voltage, V, between ohmic and space-charge-limited conduction was approximately proportional to the square of the sample thickness and was found to be temperature independent. The temperature dependence of ohmic and space-charge-limited current densities have been investigated. The results were interpreted in terms of extrinsic nature of ohmic conduction. Traps with density ≈ 2 × 1024 m-3 located at 0.50 ± 0.03 eV below the conduction band edge have been observed.
DOI: 10.12693/APhysPolA.85.953
PACS numbers: 72.20.-i